I have the T40's and they sound quite good. Sure, they do not pump out as much bass as the 300,- Onkyo 5.1 receiver + speaker combo set I have back home, but It is still enough, especially after you burn them in after a few hours of use.
I have now been using them for 2 weeks, listening music for around 3-6 hours a day and I noticed the sound has gotten a lot fuller and the bass has gotten stronger. I even had to turn them back down a little bit.
One reason for me to get the T40's over the T20's is the stands. While the T40's are higher, the screw-on stand makes them
very stable. I have to push the top 10cm to the side to go over it's center of gravity. Otherwise it will just bounce back to it's original position. The only way to knock them over is to flip the table.
At first I thought I would use them without the grills, but I kind of like the understated look standing right next to my 13inch laptop.
I am studying abroad, so my current appartment has only a 1x1m desk. Maybe I can make some pictures later this week, but I will have to upload them later.