there are many options for that configuration, it's all about budget.
Here are some I have owned and use that have worked well for me on both pc and mac with Cubase sx3, 4 and 5. Can't offer help with Logic, haven't used it in a long time.
budget based of course here.
products I have owned
motu 896 hd, great for the money has everything you need and can be modded in the future. great drivers
motu 8pre, not good, sounds thin and weak compared to the pre's on the 896.
Echo Audiofire 8, one of my favorite products for the money that whole range of Audiofires is great. The new Audiofire 8 has adat i/o. solid drivers.
I own the little brothre of the Apogee Ensemble, the Duet. It works well and has solid drivers, love the Maestro software. The Ensemble has all you would need as well.
Don't own and have never had a chance to spend much time on the Metric Halo stuff, but judging from the respones on here it sounds really solid.
Rme Fireface 800, been around for a long time, works well on mac. Just used one last month with my buddy Jason. Not one issue, Has everything you are looking for as well.
As far as expansion a/d for 8 channels, I have never used the Behringer. Used the Digimax 96k and the Digimax LT from Presonus and it worked out decent, not my favorite but it was was better that the Motu 8pre. I have heard good things about the Audient ASP008, but never had a chance to use it on anything.
hope that helps.