"Hi,
It's a good question and i never find a good answer. For example i have a client on an IBM xSeries 3650 M3, a raid 5 of 8 hdd 10k, this server host 4 WM one is TSE on win2003 32 bits and one win2008r2 with TSE. no problem and 30 clients TSE, one vm is only for Anti-Virus Trend Micro. Before that they work on IBM x336 with shared drive IBM Iseries with 30 clients (excel, word, mail, internet, Antivirus Server, bdd for logistic, with 4 gb de ram and it works.
A good tuto but in french :
http://aidetse.free.fr/"
Hum i'm really off subject i read ICTCity , and seem to be a good configuration for pc and server
+1 ICTCity
Cdt