I think any low power scope would be a good choice. You don't need anything super heavy in magnification. A 3 x 9 adjustable is probably purfect, but if you can't afford that, something in a fixed 8 power would probably treat you well also.
What kind fo shooting do you do? If you are shooting in the brush alot, like for small game, too much magnification will make it impossible to track your targets.
If you are just punching holes in paper, or shooting cans or something - an 8 or 10 power fixed would be perfect for that type of weapon.
Sorry about the late response, I didn't see this thread the first time through...