Yeah, you don't want male dwarf gouramis together. You could do a trio, 1m 2f if you weren't doing rams. Personally I think the powder blue are the prettiest.
As far as rams, same idea, they're just different varieties. Generally I'm not a hue ram fan, but I just saw a gold ram for the first time last week, wow! I don't know much about apistos either, but my boss has a pair, and afaik he doesn't have a really low pH, as he has a good variety of tropicals in his tanks.
I wouldn't worry too much about the dogs really, my cats will go right up to my tank and try to get the fish through the glass, and it's never fazed them, neither does the yowling.