Hey slutz!

I'm in the market for a second pair of studio monitors for a studio I work sometimes doing mixes and masters for their customers.
The studio has KRKs V8 V2 which I don't really like or trust to do detailed mixing on, therefore I'm thinking to get an other pair of economical monitors that I can leave there (or perhaps take with me every time I go to work there).
I will also bring along my active MixCube and monitor controller.

It is very important that this second pair is very detailed, revealing and translates very well.
I don't want to invest a lot of money, as I already have APS Aeons in my own studio, so I don't need anything esoteric.

I have put my options down to these three

1.Focal Alpha 65
For what I read, it seems to be a very good and accurate monitor. I haven't heard it myself, but didn' t really read anything negative about it.

2. Yamaha HS8
Also I hear very good things about them, but I'm a bit worried they might be more fatiguing sounding than the Focals?
Everyone seems to agree that they translate very well.

3.JBL LSR 305
These are the cheapest and I guess the easiest to move around with me from studio to studio etc.
But would they be as accurate as the 2 pairs above?

Anyone has any experience with all 3 pairs?
Do you think the Focals would be too large to take with me every time I go to work there, and what about the HS8?
Are they too bulky to carry around?

In particular I'd like to find out how the Focals compare to the Yamaha's?
Do they offer the same detail or one of the pairs is more accurate?
I can get the Focals and the Yamaha's for the same price here in London, but obviously the JBLs cost half.

Any help greatly appreciated!