My boyfriend has a Fujitsu that's a couple years old, and the fan runs constantly and is LOUD! As in, we have to turn up the music or TV when it's on because we can't hear them over the fan. It might be better on newer models, but do some web searches to find out whether this is still an issue.
If you really like the Thinkpad, there are resellers you can buy from rather than buying from Lenovo. You can't customize it, but could probably have it within a couple of days.