I third the recommendation of the CM690. The 300 looks good to the uninitiated, I even drooled over it for a bit before I hit these forums, but the 690 is a much better and practical case. It's only drawback is no window. In fact I think it's funny that the 300 has a window while it's cable management is sooo bad you get to look at a rats nest of wires through it.
Here's a pic of mine with an ATI HD2900 in it. It's a long card and there is plenty of room since the HD's mount sideways, you'll get your 5 in no problem. Get the 120 yates for this case. If you want to go for broke look at the cooler master cosmos, but I'm sure you'll be impressed with this case, if you want to see more pics of mine go
here
Oh and if you do get one, note that there is no little bag of screws, they are all screwed in along the drive bays, just take what you need from there. I didn't notice them that's why they are all still in... hehe