Just had the same dilemma, but it's essentially down to what interfaces you want and how much money you have...
I was looking in the 3-400 bracket and the only real stipulation was 4gb ram and a screen resolution greater than the standard 1366x768 which is really pants...
After much research I opted for a Dell Inspiron 1750, which I picked up off the Dell outlet for 320+VAT
spec...
Inspiron 1750
English Genuine Windows 7 Home Premium (64 BIT)
Camera Integrated 1.3 Mega Pixel Camera
Optical Drive 8X DVD + - RW Drive including software
Battery Primary 6-cell 48W/HR LI-ION
English Genuine Windows 7 Home Premium (64 BIT)
4GB (2x2GB Dual Rank DIMMs) 800MHz
Pentium Dual Core T4400(2.2GHz,800MHz,1MB)
Dell Wireless 1397 (802.11 b g)
320GB HD 5400
LCD Back Cover Obsidian Black custom High-gloss Finish
Graphics 512 MB ATI Mobility Radeon HD4330
17.3in WLED HD+ (1600X900)
It was categorised as a Grade 1 Scratch or Dent
So far I haven't found a dent or scratch...
The only thing which I've find a bit of a pain is no integrated bluetooth, but has plenty of USB's and an integrated SD card reader which is good for transferring photos from me digi' camera, but is a fairly big laptop considering it has a 17" widescreen which is excellent.
http://www.dell.co.uk/outlet