Your best bet for good quality killies is to find a breeder near you or one who will ship to you. I recommend AKA.org to do serious research about killies. Check local fish clubs and their auctions, as well.
In my opinion, doing the egg thing is a lot of work with little reward. Be sure to research it thoroughly before you decide to go this route.
I had aphyosemion australes. I think they are one of the smallest killies, certainly the prettiest, in my opinion. They can also be kept in relatively small tanks. I had about a dozen of them (both orange and chocolate varieties) in my 16 gallon and probably could've kept more.
The australes are also very peaceful. At one point, I had them in a larger community tank and they did great.
Check the buy/sell here. I think Severum Mama has some.
