Actually Miky,
Since my last post, I've torn my computer apart.
Took my Phenom II processor out and replaced it with a Sempron (which I've unlocked for two cores and overclocked).
Removed my HD4870 video card, replaced it with an HD3470 (which
I've set up to run in Hybrid Crossfire).
Re-installed the whole system in a half height HTPC case.
Added a 3.5' floppy with built in card readers and a new SATA DVD writer.

Towers are cool for power systems, but compact systems save space and look pretty cool next to the rest of your audio/video home entertainment gear.

Laptops are neat to carry around, but nothing is replacing an standard computer any time soon.