But whay about FD adapter instead of EF/EF-S? I watched an awesome video shoot in a 50mm FD, looked pretty decent

Awesome! Thank you! Just needed an opinion.

I have a Canon T3... not t3i, i wish I had T3i, way much better than normal t3i. The problem with using FD lenses on a DSLR is that you loss a lot of quality, and in a mirrorglass camera it just look normal, plus Canon EOS M can film in 1080p 24fps (CanonT3 can't), If I sell my Canon T3 I will have enough money to buy a good tripod, a good adapter with two lenses and a XGrip. Much better than just having a 720p camera. What do you think?