Chris
Needless to say, digital is a completely different animal from analog. I have been working with digital tape machines since they came out (in Germany) in 1983. We had a lot of problems with the early 3M machines with clicking and popping showing up on punch-ins, days after tracks were recorded, but in general I liked the sound of those machines better than analog. In the mid eighties there were a few digital machines on the market which didn't sound as good, so we went back to recording , at least the drums on analog.Then the Sony 3348 came out (and the Studer equivalent) and things sounded good again.
What was very clear at a time of using both formats next to each other, was that you had to treat the signals going to the digital tape different than the signals that went to the anlog tape. Analog tape is much more forgiving and has a certain sound of its own. With digital you have to create that sound by other means BEFORE you even hit the DAW / digital recorder and you're much more restricted in terms of levels and "overs". Some of my favorite mic pres (John Hardy M-1s) didn't work as well for every instrument going to digital, because they were too *clean* and I had to find mic pres which could somewhat emulate that analog tape sound. Those would mostly be tube pres or the old Neves/API in most any flavor.
And on the way out of the digital machine we were mixing through analog consoles, which would , for lack of a better word, soften the sound. We were relying on the D/A converters in the multitrack itself and after realizing that those might not be as good as it could get, we changed them to third party converters, like Apogees etc.
Now we are using a complete digital signal path and the only analog components are the microphones and the mic pres, maybe the occasional tube compressor / EQ, and it is more important than ever that those few components are absolute top quality = $$$.
The Sony console and the MX2424 are great sounding tools, but they are much more (again for lack of a better word) neutral and unforgiving. As you know, I use the Sony consoles as well and I find myself more and more looking (and finding) gear that can *mess up* the sound in a way that we have to come to love from analog tape. The EQ and compressors in the board are very transparent but also not very exciting, they just "do the job well".
Did you ever notice that you don't have to *crank* your panpot on a digital console as much as on an anlog console. IMHO that is because there is more space in digital recording, not as much noise, more emptyness (somebody put the right word in here, please). Try NOT to gate that amp noise as much, leave it on (if it's not killing the sound) and try to fill up the *space* that digital creates with harmonic distortion of an instrument or voice, dirty up your recording a little. We don't have the tools of distorting the tape, or overloading the channel in the console for sound reasons, so we have to find other means of distortion, which are pleasing to the ear.
It's very hard to describe, but the jist of it is to think about what was/is great about tape/analog sound and somehow incorporate that into your digital chain. Even though I had worked with digital recorders for many years, when I started using digital boards and a complete digital chain, it was not an easy switch. By now, I couldn't live without a dynamic EQ or automated aux sends or automated dynamics, I would probably have a hard time mixing on an SSL. In fact, I remember when we did a song for the movie "54" I had to do mixes in NYC on an SSL 6000 and ended up renting a couple of 02Rs for the mix, using the SSL for FX returnsfuuck heh
I would suggest you follow Jules advice and get a Crane Song HEDD. That will serve many purposes in your studio: You can use it as a harmonic distortion box on your way into the MX2424, you can use it as an absolute wonderful A/D - D/A converter or as a sample rate converter when you mix and strap it across your 2mix bus to insert analog equipment on your 2 mix bus.
Digital takes a while to get used too, especially when you grew up on analog and have to *unlearn*. Don't get frustrated, it happened to most of us. To me, learning to deal with new audio equipment is half the fun (the other half is listening to a guitar player getting his G string in tuneheh )
All that said, being a true gearslut

, I bought the Chandler EMI compressor today, it really *messes up* the sound in a great way.
Sorry for rambling...