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I have currently, 8 (soon to be four) roos that are all production reds save one who is an australorp mom and ?? dad.My hens vary some though....BR,GLW,Welsummer,NH's,BJG's,Production reds,and some barnyard mixes.And yes,the humane factor is huge along with the chemical free aspect.
Those are all good DP breeds for meat.  Your best meat breed is probably your NHs.
Also, you may already know this, but a Pro. Red or Aussie roo crossed with your BR hens will make Black Sexlinks.
At any rate, Pro. Reds and Aussies are excellent egg production breeds, so their pullets will make very good layers. 
I would say your best meat breed is the BJG, although the NHs might be more economical due to slow maturity of the giants.
If you cross or breed a Production red to a Production Red, you are breeding to hybrids and may not get the egg laying prowess of the parent stock.  Same with breeding a Production Red Roo to other breeds.  If you are interested in a self sufficient flock, you should get at least one if not two non-hybrid roosters.  They then could be bred to your other hens (of the same breed) and propagate your flock.  Cross bred hybrids will do OK for a generation or three, but they will loose the production traits with time.
I have RIR, Orpington cross hens that are great layers but I do not expect the same would be true with these mutts offspring. They are great egg layers and will make great dinner guests.