Greetings.
Two species that I love for mame are Japanese Flowering Apricot (Prunus Mume) and Flowering Quince (Chaenomeles). They make splendid mame bonsai with great character and beautiful flowers. Here is a mame web-site that has photos of a number of trees, including a few flowering apricots and flowering quince. I think you'll like it:
http://mini-bonsai.com/indexe.html
As far as pots go, with mame I have actually seen some great deals on ebay.
If you are interested in the Prunus Mume and the Flowering Quince, Brent Walston at
http://www.evergreengardenworks.com/index.htm has a few prunus mume and an awesome selection of flowering quince of unbeatable quality at great prices.
Have fun.
Wendell