Thanks, you dont think it comes out to much?

I took the 350 a couple of times and they was more bothered about the weight rather than sizeI have a 250; you might want to check whether the 350 can be taken as carry on baggage on aeroplanes (or it might not matter to you). I have taken the 250 on board fairly frequently.
Regardless of what the spec sheets say I pack a 40d, 100-400, 24-105, 10-20, 50mm and flash in the bottom part of my 250 happily enough.
Great bags whichever you go for.
I took the 350 a couple of times and they was more bothered about the weight rather than size