Should I breed my thoroughbred mare with Nashua, Native Dancer and Bold Ruler bloodlines?

I am new to thoroughbreds and own a jockey-club registered mare Hey Rose with bloodlines that include great-great-grandsires Native Dancer and Nashua (see http://www.pedigreequery.com/hey+rose). Also great-great-great grandsire Bold Ruler. Her sire Hey Rob had winnings of $135,000. My horse won a $1200 race in Idaho and I'm not sure why she didn't have more races - maybe did not behave as she can be feisty. I'm considering breeding her. How do I find out what potential value her offspring might have were I to breed her (I realize this is also dependent on who I breed her to)? I know if you trace back far enough many thoroughbreds have great bloodlines - where can I go for advice on her. She is also a little on the small side for a thoroughbred, but wow, she is an AMAZING horse to ride. Also, I live in Montana, probably not the best market for thoroughbreds.