My main PC is an HP desktop I bought 3 years ago. The HP has a quad core AMD processor running at 2.6 GHz, 8 GB DDR 2 RAM and a 2 TB hard drive.
I also have an HP DV6 laptop that's a year old but I do not use it as much as my desktop. My desktop has a 25" wide screen HP monitor and I prefer it to the 15.4" screen of the laptop.
Both systems are running Linux Mint 14 KDE x64 just fine.