Yeah dude seriously,
Anyway back to the question, I do not know any good All-in-ones but I can see the specs going like this.
Quad Core Processor 2.4ghz+
Nvidia Gts 250 or higher.
6 gigs of DDR2 1066 RAM.
Built in sound into a motherboard.
Standard CD/DVD drive
750 gig hard drive.
Basically if you can find a computer like that in a normal case, you find yourself an all-in-one PC