Antec P180 for quiet and sleek minimalist case. Tough to cable well though. Antec 900 for some bling as a "gamer" case, watch out for dust though in that thing.
Do you REALLY need modular? It's really easy to invest $1 in zip ties and tuck a few cables out of the way and tie them down. Seriously. For the money, you could do better really if you don't absolutely have to have modular.
See, I like the minimalism of the P180, but i also like the added cooling of the 900, because i am thinking of over clocking (i just wish there wasn't the stupid window). And on the PSU, that OCZ one is on sale so it easily makes up for the modular cost (and then some)