As with any company these days, YMMV.
I’ve had excellent performance out of Dells I’ve purchased, both personally and professionally. Considering how heavily I blend, my Dell 4550 PC has held up admirably.
Check out http://www.Notebookreview.com for some reviews and coupons. I just found one the other night for $750 off :o
Of course companies probably tweak their system packages so they mostly get the price they want anyway 
I waited a very long time to get a new laptop, and this morning I finally did it. Ideally, I wanted an AMD64 processor. I would have loved to get one that HP was selling with the 4000 processor, but they have no NVIDIA options.
I don’t want a computer I can’t blend with 
So this morning I configured this system at Dell.com, plugged in the coupon code, and the price was right for me:
Inspiron 9300 Intel® Pentium® M Processor 750 (1.86 GHz/2MB Cache/533MHz FSB)
Operating System Microsoft® Windows® XP Home Edition
Display 17 inch UltraSharp™ Wide Screen XGA+ Display
Memory 1GB Dual Channel DDR2 SDRAM at 533MHz 2 Dimm
Video Card 256MB NVIDA® GeForce™ Go 6800
Hard Drive 60GB Hard Drive
Network Card Integrated 10/100 Network Card and Modem
Adobe Software Adobe® Acrobat® Reader 6.0
CD/DVD Drives 24X CD Burner/DVD Combo Drive
Wireless Networking Card Intel® PRO/Wireless 2200 Internal Wireless (802.11 b/g, 54Mbps)
Office Productivity Software Microsoft Works Suite 2005 - Includes Word 2002, Streets & Trips 2005
Security Software New! Norton Internet Security 2005 AntiSpyware Edition 15-months
Digital Music Musicmatch® Jukebox Basic
Primary Battery 9-cell Lithium Ion Primary Battery (80 WHr)
Limited Warranty, Services and Support Options 2Yr Ltd Warranty, 2Yr At-Home Service, and 2Yr Technical Support
Internet Access: Dial-Up 6 Months of America Online Membership Included
Digital Imaging Photo Album™ SE Basic
Miscellaneous Award Winning Service & Support
Financial Software No QuickBooks package selected- Includes limited use trial
Operating System Backup & Recovery Microsoft® Windows® XP Home Edition backup CD
TOTAL:$1,723.00
A 17" Ultrasharp laptop with a 6800 GPU and 1GB DDR2 RAM for just over $1700 
I had looked at many companies, including Alienware systems, and ABSPC.com, which offer some nice systems with AMD processors but no NVIDIA options.
Alienware had no AMD options for their laptops, and their systems are very expensive anyway, sleek and cutting-edge as they are. Their AMD X2 dual core desktop systems though seem incredible, and they do have many NVIDIA options. Imagine blending on those things!
I was disappointed with the bulk of notebook sellers out there offering only ATI card options. This left me with few choices, so my good past experience with Dell and the huge savings helped me make the final decision.
So I’m excited after such a long wait. This laptop may be a faster blending station than my desktop. I only hope Blender works flawlessly with the 6800!
RobertT