Agree with NeoDude, Antec cases are good for the price and are nice and easy for access (you still want to get into it easily to build the PC, after all. You don't want to be pulling out the PSU just so you can fit the motherboard like some cases force you to do.)
Coolermaster is another brand I like, but these ar just my personal choices.
Oh, one other thing, I would go for a PSU larger than 500w if possible, won't do any harm and since the psu will be stressed less it should last a heck of a lot longer