Hey Flix
I use the Opteka 6.5mm ƒ3.5 and its pretty sweet. it cost me $280.
Ive been pretty happy with it.
I thought it might be a bit slow, but it seems fast enough.
Cos of the T2i's crop factor, i figured that i wanted the widest lens possible to match the distortion i was use to seeing on my good ol' VX1000 with death lens.
Ps. Joe, i love that pic of the Ambrose!