I'd like to suggest Buckeyes. On the dual purpose scale, they tend to be better for the meat aspect, but lay enough eggs (about 180-200 eggs/year) that you can still get plenty of offspring. I have been selecting the largest and fast growing birds for my breeding stock. I am early in the process, but have seen some positive results from the last batch I did, and I just hatched out 50 more chicks. We'll see if they do any better.
One thing I would like to add. Just remember that CX and DP's can't be equally compared on a butcher weight basis. If a CX and a DP both dress out at 5 lbs, there will be more meat on the CX due to smaller and less dense bone structure. This is something that I didn't realize until I had butchered and eaten both. Personally, I LOVE the taste and texture of a DP bird. Problem is I don't have the patience to wait the amount of time it takes to raise them up. I can do twice as many CX as DP in the same time frame. On the other hand, I like the self sustainabilty aspect of raising DP breeds. It's a double edged sword, I guess.
One thing I would like to add. Just remember that CX and DP's can't be equally compared on a butcher weight basis. If a CX and a DP both dress out at 5 lbs, there will be more meat on the CX due to smaller and less dense bone structure. This is something that I didn't realize until I had butchered and eaten both. Personally, I LOVE the taste and texture of a DP bird. Problem is I don't have the patience to wait the amount of time it takes to raise them up. I can do twice as many CX as DP in the same time frame. On the other hand, I like the self sustainabilty aspect of raising DP breeds. It's a double edged sword, I guess.