Currently, I've looked at the Alienware Aurora m7700. Specs:
Processor: AMD Athlon™ 64 FX-60 with HyperTransport and Dual Core Technology
Display: 17" WideXGA+ 1440 x 900 LCD Display
Motherboard: VIA K8T890 + VT8237A Chipset
Memory: 2GB Dual Channel DDR SO-DIMM at 400MHz - 2 x 1024MB
Video/Graphics Card: 256MB NVidia® GeForce™ Go 6800 Ultra
Hard Drive: Extreme Performance (RAID 0) - 160GB (80GB x 2) 5400 RPM SATA
Cost- approx. $4500
And also the Monarch Hornet Pro. Specs:
Motherboard: 110642 - Asus A8N-VM CSM GeForce 6150
Processor: 120305 - AMD Opteron 185 Dual-Core 2.6GHz
Memory: 140178 - DDR (400) 3200 - 1 GB (2 pcs 512) Corsair
Hard Drive: 150614 - SATA - Seagate (3120827AS) 120 GB/7200-RP
Video Card: 190281 - Asus GeForce 7900 GT 256MB DDR3/PCI-E/HDT
ViewSonic 19" VP930B Thinedge HDTV LCD Flat Panel
Cost- approx. $3500
Primarily, I'm concerned with the combinaiton of portability and performance- I don't want to be stuck with something that will run this quarter's releases and then quit, but I don't want to lug around 40 lbs. of equipment either. Cost is, of course, better if lower, but that comes secondary to the convenience and power of the system. Does anyone have suggestions on better builds of these systems, other systems that I could look at, etc.?