I haven't used Peapods but have heard only mostly negatives about them. Haven't heard of mommy's touch. Personally I couldn't get a good fit with Green Kids, but that's an individual thing.
We did use ecobubs pockets and happy babes pockets with no dramas. You don't mention how big your son is, but DD is 14kg and wouldn't get much more wear out of the happy babes if she was still in nappies, just due to size.
Might be best to get a few different ones to try until you work out what suits you best.