1x Seagate Barracuda 3,5'' 500GB 7200 SATA II
1x Seagate Barracuda 3,5'' 250GB 7200 SATA II
1x Seagate Barracuda 3,5'' 120GB 7200 IDE
1x HDD 3,5'' 160GB 7200 IDE
1x Samsung HDD 2,5'' 160GB SATA II
#1 -->1 PC for "Server" purposes (deals with pdf and doc/excel documents library organised in folders, so no special software to organise them is required), should be able to be easily accessed remotely to this specific partition, the other partitions will be destinated to recieve diferent types of files. Needs to run ocasionaly some windows software.
Should also be able to open and edit .doc(x)/.xls(x)/.pdf(x) files for some office work and also some web surfing.
#2 --> The other machine is for gamming purposes to be runned on a 48'' LCD mostly for gamming, ocasional web surfing and downloads. And should be able to run from older games like warcraft III till some more recent ones.
So, I'll be witing for your answers, and will be looking forward to hear your advices/opinion about this matter. Also If aplicable refer wether you would or wouldn't do overclocking and why/how.
I wouldn't use any of those processors for gaming. Any of them would work for a server. It also looks like you don't have near enough memory. Any modern operating system, such as Vista, Windows 7, Windows 8, or any Windows Server OS, needs more than 2 GB, and the most RAM you've got for any platform is 2 GB. Not enough to run any OS in except Linux.