I highly recommend Seekins for both. Excellent quality and really good price for a top tier set of rings and base. If that is out of your budget - you can get by ok on something like the Burris XTRs or SWFA rings. I used the Burris XTRs on a first build and they were decent. But the Seekins are well worth the extra $$.
Go to Harbor Freight and spend $20 for a inch-lb torque wrench. You will be happy later on, trust me on this.