The case will probably be ok if your on a strict budget, i just think it was worth spending abit more but then ive never bought a new pc case before so what would i know! im just going by what ive red on this forum and others.
And yes it should run 2142 nicely, im not sure how the 1 gig of ram will fair though. The minimum is 1 gig to run it but if you crank the graphics settings to the max(your gpu should allow this) then you may find the game lags/stutters abit, maybe it wont as you have a decent processor but theres only one way to find out!
I can run it on max settings with good frames per second so im happy(fantastic game by the way, one of the best ive played for years)