Re: Weaver: rings & base reviews please
They will work until you can afford better.
You may run out of scope's elevation adjuster travel beyond some particular distance without a sloped mounting setup, but that may be less critical if you're newer to Precision shooting. It's OK to swim in the shallower half of the pool until everything lines up right for the deeper plunge.
Penny wisdom? (Penny wise, pound foolish...).
If money prevents you from getting started when affordable beginner's equipment is available, then holding back to save for superior stuff may be counterproductive. The sooner you get up and running, the sooner progress is possible.
In fact, once I had the basic setup working, I'd be looking to obtain a good basic .22LR Trainer, and not seriously consider upgrading a working rifle until after the .22LR was well used. The .22LR trainer provides the best training bang-per-buck of all the possible upgrades/improvements your training program could be funding.
Once again, the important issue is functionality. I saw a Savage MKII .22LR in Wal-Mart yesterday, NIB for $179. That's what I use.
Greg