My s939 system is really starting to show some age, and I'm beginning plans to put together an i7 system over the next 2-3 months. I'm currently using a 4 year old Antec P180, one of the first line I believe. It's got a few scratches but otherwise in good shape. Should I see this as an opportunity to upgrade my case (budget is a factor) or re-use the current one? Have cases (below the extreme enthusiast models, at least) advanced a great deal in that time?
I'm leaning towards keeping the P180 simply for budgetary reasons, but I would like to keep the S939 system as a secondary/server/folding system. What would be a solid inexpensive case for the old system?