Best server?

Nuke Bomb3r

FS Member
Which would be the best server for someone on a tight budget? I wanna start hosting from home.
Also, which would be the best isp for hosting?
Well, take into costs if you wanna host from home the electricity, mantainence, and stuff required. Those ain't free.

And if you run a poweredge 2950 from home, it's a power hungry 2U rackmount :)