Replying to Nikon d90 or t2i 550d? HELP!!

so i got a nikon d70s now, and im thinking about buying a DSLR i can use for filming.
i got 3 lenes for my d70s:

Sigma 15mm fisheye F/2.8
Sigma 55-200mm F/4-5.6
Nikkor 18-70mm F/3.5-4.5

so should i buy a d90 so i can use my lenses? i think the lenses are more worth to me than what i would get for them if i sell them. or should i buy a t2i? i have never used a canon camera before.
i have filmed alittle with my friends d90, so know how the d90 works.

i need some help/tips!
and sorry, i know my english is very bad, but im from norway. ask if there is something you dont understand and i will try to explain.