Thanks a lot for your help and suggestions.
I'm not too keen on the honey gouramis. I know this probably doesn't make sense to any, but they kind of remind of some sort of bug, like roaches. (odd I know).
I do like sparkling gouramis though, although they had some at my lfs the other week and their croaking was so loud. I imagine they would be a lot quieter at my house, where there would be less of them and there wouldn't be loads of people walking past and peering into their tank, but it still concerns me because my tank is in my bedroom and I am a light sleeper.
At the moment I am still thinking male endler's, preliminary research suggests they should be OK.
Since pygmy cories are so sensitive, once the tank is cycled, should I add the endler's first and then wait a couple of months before I add the cories? It seems like the sensible thing to do, but I am worried that some bacteria will die off with just the endler's as the bio-load would be smaller than the ammonia I add when (fishless) cycling. So there could be less bacteria after two months of endler's, than there would be straight after I finish cycling, if that makes sense.