Motu is really beautiful with a Mac because they go together...Motu has also done really great in improving the specs for windows users and there aren't any major problems..
Focusrite is good too..
I've got a steinberg Cl1 because i have my behringer mixer and i dont really need any more inputs and outputs...i will upgrade to a Motu in the future though...
just get one that works and make sure it's got more inputs and outputs...even if you won't use them all, having more i/o jsut makes stuff easier in the future...imo
EDIT:
i have the KRK rockit 5 2nd generation. I'm looking for stands for them. Would those in the pic work for mine? I saw some but the stand looked really flimsy and i dont trust my KRKs on top of something like that. Which ones do you recommend for the KRKs? Or would yours do fine?