I agree with Bob about generally sticking to one size eyepiece because of the balancing issues, although of course this is not insurmountable!
If I was sticking to 1 1/4", I would go for something like the TV 32mm plossl (the biggest true fov you can get in a 1 1/4" eyepiece), the 13mm Nagler and the 3-6mm Nagler zoom. I have each of the these, and they work really well in my TV 76.
It is pretty rare that the 3-6mm doesn't give great high power views: the smaller aperture scopes tend to be better in poor seeing than bigger ones.
Have you had a play with the eyepiece calculator on the Televue site?
http://www.televue.com/engine/TV3b_p...CULATE#results
All the best, and happy playing with the new scope!
- Dean