Dell XPS for Flight Sim 2004? - REQ New Computer Qdvice

On the verge of a new system, going whole hog as that's the only chance
of getting something that won't be obsolete before it's paid for. Top
in the running is a new Dell XPS w/ 3.2 gHz non-"extreme edition" P4
CPU, 2x120 gig SATA HDs in RAID 0 array, 2 gig dual-channel DDR memory,
ATI 9800 Pro XT video, FP2001 20" LCD flat panel display. Planned uses
include pro-level digital darkroom and video editing w/ Adobe Photoshop
& Premier, general MS Office uses w/ DBMS development & MS Project
(gotta pay the bills), general internet, and of course, last but
definitely not least!, looking for the most intense and accurate MS
Flight Sim 2004 experience possible (hence posting here). Any user
feedback on this system and its capabilities with Flight Sim? Pros and
cons? Other computers or options I should consider?

Thanks for your input...

Steve