New Laptop

I just purchased a new laptop a few days ago and I should be receiving it in the coming week.

It's a Sager NP5750 configured as follows:

Sager NP5750 - V
17" WXGA+ (1440 x 900) Active Matrix Display Glare (glossy) Type
Intel Core 2 DUO 2.0GHz (T7200) Processor (Merom / 4 MB L2 Cache / 667 FSB)
Artic Silver 5 (AS5) Thermal CPU Paste Compound
Ati MR X1600 128MB w/Hypermemory up to 512MB VRAM
2048 MB DDR2 (667 MHz) Memory (1024 MB x 2)
80 GB Hard Drive (7200 RPM) SATA
8X DVD±R/RW / 4X+Dual Layer / 5X DVD-RAM / CD-RW Multi Drive (Pioneer DVR-k16)
Integrated V.90/56K Modem (V.92 compliant)
10/100/1000BASE-TX Fast Ethernet on boardLAN Card
Internal Intel 2915ABG 802.11a/b/g Wireless LAN
8-cell Smart Lithium Ion Battery
4-in-1 Flash Card Reader (SD/MMC/MS/MSPro)
Integrated 1.3M Digital Video Camera
Ac Adapter w/ power cord included
Free Carry Case
No Operating System Installed, drivers included on CD-ROM
1-year parts / 1-year labor warranty from Sager
Lifetime toll-free technical support by calling 800-741-2219 (or 626-964-4849)

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I wont be using it for heavy gaming however I might want to at some point, but I will be using it for 3d modeling.

My question is, does anybody else here have the ATI Mobility X1600? From what I have read about it, it does not seem like a very powerful card. I'm thinking about trying to get my hands on a Nvidia Go7900 GS. This laptop is fully upgradable so I know its possible.

If anyone has any advice or experience or just an opinion let me know, Thanks guys.