SXPS13 before-purchase questions inc win7 q's

I am just about to purchase my SXPS13 here are the specs:

DELL STUDIO XPS 13 (1340)
New generation XPS
Obsidian Black with Leather Accent
Intel® Core™ 2 Duo P8700 (2.53GHz/1066Mhz FSB/3MB cache)
4GB, DDR3, 1066MHz 2 Dimm
256MB NVIDIA GeForce 9500M Video Card
320GB 7200RPM Hard Drive
13.3 inch Edge-to-Edge HD Widescreen LCD (1366x768)
Microsoft Windows Vista Home Premium
Integrated 2.0M Pixel Webcam
8X DVD+/-RW Dual Layer Drive
Dell Wireless 1510 802.11a/g/n WLAN Mini Card
Dell Wireless 370 Bluetooth Module

i have few questions

1im not able to get LED due restricted reasons....for people who have the regular CCFL screen....is the brightness screen okay and the contrast and black levels?especially for playing games and other activites?
i would love to get the LED option but at the moment i cant, and i hate to settle for 2nd best but i have no choice just wondering if its okay overall
and does anyone know how much laptop weight difference is over the LED?
2. would having the P9500 make a drastic improvement over the P8700 processor?
3. so no possible way to replace the dell wireless with Intel 5100 & 5300 Wireless cards?
4.People who have installed Win7 RC1....are there any kinks with win7 installed? probs, or things that arent working properly, like FN keys, hybrid SLI graphics. that kinda thing...
currently using Sony Vaio SZ4MN/B and all my friends inc me who installed win7 on our vaio's dont have working FN keys w/ visual except for vol up, down and mute, but no visual
any help is appreciated
P.S. im buying this refurb from ebay with dell one yr transferabble warranty that was issued in may...and i know the screen res is a misprint :wink:
buying in usa getting it sent to me here in uk....need that US keyboard plus its cheaper for me, since im on a budget $1049--> £642 or $1099-->£673 if i get the P9500....if someone wants i can send them a link

 

Well I am running Win7RC and it works like a charm

 

thanks for the reply, gonna order tomorrow so hopefully if anyone has any last tips it would be appreciated

 

you should upgrade the screen to the LED one. It's really nice
i've tried a 5300 card in it and I had a lot of issues with it (freezing after restart and when coming up from sleep...so impossible to use it)

 

yeah i found a link for a LED option one but the warranty is a bit wierd to me since its a refurbished this isnt from dell refurbished its their company refurb, and they are dell partners but the warranty is with them and if i run into a prob then i have to send it to them and they'll send it back to me .. i guess its okay but it doesnt beat having the tech come to your place and being there while he works =)