Full tower might be easier to build out of with 4 HDD's and two GPU's, but keep in mind, they get really pricey ($120+). I don't know many people who use full towers, but the HAF932 has always been a good choice. The Silverstone RV02 is pricey, but also nice, as is the 800/700D from Corsair.
If you want a mid tower, I'd suggest something really easy to build out of like the CM 690II. Of all the builds I've put together, that's been one of the easier ones to work with. The PC-K62 from Lian-Li wasn't too bad either. I would avoid the Antec 900 as space can get really cramped with all that hardware you listed. All in all, you should really pick what you think looks best.