Here's a few:
HP Touchsmart
Not the fastest PC available for this price but certainly one of the coolest. This desktop comes with a touchscreen built in, as well as special software to make touch-screen computing easier. Starting from $1,299.99, these aren't cheap but they give you a cool factor few other PCs can boast. Only time will tell how long that remains though.
Dell XPS
As a gamer, I find this model of PC to be particularly enticing. The brand XPS is known for delivering high performance computers, and the line has as of yet, never failed to deliver. Telling any tech enthusiast you have an XPS will surely grant you a nod of approval from any self-respecting tech enthusiast.
http://www.dell.com/content/products/category.aspx/xpsdt?c=us&cs=19&l=en&ref=dthp&s=dhs
Alienware
If the XPS is the Rolls-Royce of computers, then this is the Hummer. Large, loud, flashy but extremely powerful. This is the absolute best computer I've seen on the market, in my opinion.
http://www.alienware.com/products/desktop-computers.aspx
Next time I'll cover mid-range PCs, the type that most people would want to look for.