I use Leupold bases and rings and weaver bases and rings. Both are similar to each other and provide good strength and stability.

Both of these bases and rings will allow you to mount most scopes found on the market.

Check the scopes poll for ideas but don't kill yourself trying to buy a 2k$ scope. A lot of the less expensive scopes are actually very good. Just remember, A good scope does not make up for lack of shooting practise.

inexpensive scopes that I like and have used -

Bushnell
Simmons
Barska
Redfield
BSA

Midrange -
Burris
Lower end Leupolds