Bags are easily my choice, and you can make your own sooo cheap. They're quick, handy, and don't stop me from shooting great groups. I don't doubt a good high-dollar rest could take an eighth inch off of my groups at times though. Throw a sweatshirt or something over your stock to take your breathing and heartbeat out of the equation more easily. With a solid rest, the most important part of shooting is pulling the trigger cleanly.