I have received quotes from Dell for both the Inspiron 6400 & 9400, specs as follows. Do you think they are good deals for the specs??

9400 £1057.57 (inc VAT & delivery)
T7200 core 2 duo processor
17" widescreen WUXGA (ultrasharp + truelife 1920 x1200)
2048 MB Ram
160 GB hard drive
8x DVD/RW
Nvidia Geforce Go 7900 graphics card
Vista Ultimate OS
Free Inkjet Printer all in one 926

6400 £869.57
T7200 core 2 duo processor
15.5" widescreen WUXGA (ultrasharp & truelife 1440 x 900)
2048 MB ram
160 GB hard drive
8x DVD/RW
ATI Radeon X1400 graphics card
Vista Ultimate OS
Free Inkjet Printer all in one 926

Am undecided which model to go for, really comes down to the screen size. Don't do gaming so the graphics card is not an issue. Will be buying as an investment for the next 4 years, can anyone advise?

What will be its primary intended use? I know you said not gaming but will you be carrying it around a lot or taking it on plane trips or using it mostly in one place, etc. The more you have to haul it around the larger laptop might be less convenient, especially if you are sitting on a plane trying to use it. On the other hand if you are using it almost as a desktop and not moving it much, the larger screen would make more sense.