I have the DC720, and I just sold the DC970 (replaced it with a DCD970KL hammerdrill.) The DC970 will be on Lowe's Black Friday list @ $99, the DC720 is lighter in the hand, as well as physically smaller, has a slightly improved grip and a bonus is the light. It'll really come down to cost, and with the DC970 running at $99, you'll be hard pressed not to choose it. However if you think you might get tired of holding a SLIGHTLY heavier drill, or need the light, or need the compact size, or the slightly better grip, the DC720/760 might be more fun. I got my DC720KA (kit) off of eBay for I think $160 shipped last year.
Lowe's is doing a Black Friday preview on Facebook, that's how I know the drill will be on sale again.
