[hussong]

Thinkpads are generally a safe bet.

I've been using different models from the X-Series with Ubuntu since 08.04 and am currently looking at the T450s (14", but still an Ultrabook and light enough for me).

The X1 Carbon looks damn sweet as well.

[easytiger]

The X1 Carbon (latest.. 4th? gen) is my daily laptop since release and I can't wait to get rid of it. In anything other than low light/perfect lighting the screen is unbearably dull, speakers are appalling (though in ubuntu you can override to > 100% volume). Keyboard is pretty unsatisfying to use also.

I got it because i wanted a 14" laptop and it was the only one on the market. Screen size is perfect (15" is a bit big for travelling & carry on luggage)

This looks like the laptop i've been waiting for

[hussong]

I was surprised how light the T-Series models have become, hadn't looked at them in years and only remembered the heavy clunky units that made me go for the X-Series.

The current model T460s is also interesting, quite a bit more performance than its predecessor, albeit in a different price bracket.

I'm mostly going for the 450 because there's tons of decent refurb available and I'm frugal that way ;-)

[lozf]

Just be sure that you're comfortable with the trackpoint on the 450... They swapped the buttons for a touch sensitive area at the top of the trackpad. The physical buttons have made a welcome return on the T460 range, but if that doesn't bother you, enjoy a great machine.

[chx]

You need to understand the R series became the T4x0 and the T4x0s is the real continuation of the T series.

[asciimo]

Same here, except I have a different experience. Maybe it's because I upgraded from a 2010 Macbook Air, but I like the screen a lot. The speakers suck, I agree, but I rarely use external speakers when I'm in laptop mode. I really like that it runs Ubuntu almost perfectly, and that it has 16GB or RAM. I do wish the video card was more powerful, but it drives a 4k monitor (as well as its own display) quite well. It's stupid lightweight, too. Makes my 2010 Air feel like cast iron.

[zem]

i love my 4th gen carbon (work laptop), but i have to agree the speakers are appalling. way worse than the 1st gen carbon it replaced.