I have a 4 1/2 month old female and a 5 year old female. They have to be the cuttest dogs I have ever seen!!! Their personalities are absolutley hilarious. I can watch them for hours and they totally crack me up. While they are known for being hard to train, very head strong etc...That has not been my experience. The only drawback (if you view it that way) with both is they innately will chase and kill small furry rodents and birds (the 4 1/2 month old can't catch them yet). They were originally bred for hunting so it is in their makeup. I would recommend getting one, absolutely adorable. My 5 year old still looks like a puppy. Both of mine are all white, which is a little more rare. try
http://www.riverrunterriers.com, great blood line and temperment (great experience purchasing my 4 1/2 year old.