C'mon, guys. You can buy an XPS today with dual-channel DDR, 800MHz FSB, and an ATI MR9800 if that's what you really want. The 9200 is fine for 99.9% of my needs, and I can't see paying a premium for more speed than I need.
And as far as thinking the 9300 will be cheap, we already know Dell overcharges for things like RAM, disk, and video card upgrades. What makes you think they'll give you a deal on DDR2, the 6800go, and Intel's latest processors? It has never happened before and it never will.