IMHO I was a bit disappointed with the i6000d for a few reasons:
While the Samsung WSXGA screen had great resolution, the colors were so-so and a bit washy with very narrow viewing angles. This was even after tweaking the gamma, etc. in the display properties which is something I've grown accustomed to do (since most LCDs seem to look like shit out of the box with factory settings). 'UltraSharp' does not automatically mean rich vibrant colors with superior contrast.
Putting the underwhelming display aside, what really turned me off was the plasticy bottom of the chassis. When you look at the i6000 in pics you assume it has the same solid, rigged build and chassis as the 9200/9300 - but when you see and hold it in person, you realize it does not. The bottom casing is regular plastic and while it is somewhat sturdy for regular plastic, it is very soft and flimsy under the optical drive. You can squeeze the bottom of the drive with the white strip on the top of the palm rest and it will bend and squeak together with little effort.
However, the thing that really annoyed me was the display lid and how it would rattle slightly up and down when closed. Not sure if this is like that on all i6000's, but the one I saw didn't close properly (like older Dell notebooks) where the feet on the display didn't fully meet with the palm rest when closed. Whenever you picked it up or push down a bit on the lid, you'd here it 'give' and rattle.
Over all, the i6000 that I previewed had a noticeable inferior build quality to its larger and smaller cousins (9300 and 700m). The cheap price, sharp looks and great battery life weren't enough for me to look over these shortcomings. Your model however may be different and not have these issues (except for the plasticy underside of the chassis as I can't see that being different on various models as say the LCD or lid issues).