Gateway m460 vs. Dell 6100 (Please Help!)

Hello,
I know this is a common question, but I hope someone may sway me one way or another on my laptop purchase. I just can't decide which way to go!

First:
Dell 6100
Pentium M 740
128MB DDR ATI's MOBILITY™ RADEON X300 PCI Express x16 Graphics
15.4 inch UltraSharp WUXGA LCD Panel(best screen available on this system)
1GB DDR2 SDRAM (400mhz I believe)
80GB Hard Drive
8x CD/DVD burner (DVD+/-RW) with double-layer DVD+R write capability
9-cell Lithium Ion Battery
windows media center 05 w/remote (possible tv tuner add-on in future, so could be nice option?)
2yr warranty
All-in-One Printer 922
$1476 total (w/tax and shipping)($750 off promo included to get price)

Second:
Gateway 460xl
Pentium M 740
ATI Radeon X600 128MB Graphics
512 DDR2 SDRAM (533mhz in 1 dim)
80GB HD
Modular 8x Multi-Format Double Layer DVD Writer (DVD±R/±RW/CD-RW)
15.4" WXGA Ultrabright TFT Active Matrix (Best screen option)
Primary 8-cell Lithium ion battery
Windows XP pro
1yr warranty
Epson CX3810 Multifunction Printer (Free after MIR)
$1440 total(after $90 MIR on printer= $1530 before)(with 10% off system)

I see pro's and con's with each, so it is a tough call. I don't know which screen looks better (I heard gateway screen looks very nice but dell's has a higher resolution), or which video card is better ( is there a big difference), if the 533mhz memory in gateway is that much better than 400mhz in dell (dell system has 1ghz of memory, but at 400mhz), and the gateway has a removeable optical drive (Dells is fixed). I am going crazy trying to decide. Please give me some feedback. I am a student and I really am unsure what exactly I will eventually use the notebook for. I just want the best choice for my money that will allow me most future growth.
Thanks