Acer Timeline X is decent.
For that slim size, you can't beat having a mobile Core i7 and a
HD5650 in there. Plenty powerful.
However, they tend to heat up pretty fast due to lack of
cooling.
Acer Aspire series is so-so, they have pretty good hard
drives (WD), but the most common thing for them is fan failure. I
have no idea why. Also, the PC itself doesn't last very long
without something going awry.
Fujitsu on the other hand is modest with specifications but
really expensive. This is because of the solid build quality, which
I believe is one of the best in the industry.
Hardware on the other hand, is of mediocre specification.
If you don't mind buying latops from outside, I would suggest
going with Asus. Decent build quality (only my unit out of 7 others
I recommended 7 friends to buy, all similar model) had some issues.
Even then, these are minor issues like the keyboard being a little
wobbly - that's it.
Specifications and price are rather decent for Asus, do check
them out.