From having worked in sport shops, owned a sport shop and having worked in the Cabela's archery dept., I strongly suggest you select a weight 20-25lbs less than the compound you're shooting. If you're shooting a 70lb compound, think 45-50lbs for your recurve. If you can't shoot 70lbs out of your compound and 60lbs is more comfortable for you, then think more 40-45lbs for your recurve.
Remember, there is no letoff. Also, when you get your new recurve, you're probably going to want to shoot it a lot. With a 40-45lb bow, you can shoot it for a long time and enjoy it. A 50lb bow isn't as nice to shoot for longer periods of time.
For deer, don't worry about 40-45lbs for killing power. With the right setup and moderate ranges, you'll shoot right thru deer with 40lbs. You can hunt most anything in North America with 45-50lbs, with the exception of brown/grizzly bear.