To be honest I think you are on track with the Samsung It's nothing special at the rrp and perhaps a bit heavy (1.3 Kgs), but you get a good price and it's good value. It's really cool looking too. If you get the chance to upgrade the RAM to 2GB I think you should do so.
The only complication is that both the Samsung N140 and Toshiba NB200-11L offer similar dimensions and battery lives, and yet can cost considerably less. Neither of those two models offer the Intel Atom N450 processor, but since this makes no real difference to overall performance, that’s not really a factor.