Haha it's okay I know the excitement of a new build.
My processor is overclocked all the time, ill run a test after this post to test stock clock temps.
As for the Case, its really not the best. I had pretty sliced up fingers , lots of sharp edges inside! the case has a few blood stains inside lol - (too much info?) The ventilation is seems good although i have nothing to compare it too really as my previous pc's were Compaq's etc.
I'm going to get an akasa zen (scan.co.uk/Product.aspx?WebProductId=723916) very soon it seems like a nice quality case. I think its best to not to skimp on the case and maybe pay the little extra for a branded one.