Stability Shoes, gimmic?

Today I went to my local running store, Fleet Feet to get a new pair of shoes for Cross Country. When I went there, they insisted that I needed stability shoes. I have run in a pair before and I find them bulky, annoying, unappealing, and uncomfortable. I have also run in minimalist shoes and neutral shoes. Oddly, I ran the fastest in my minimalist shoes. Also, in those shoes, I had no pain or injury. On the contrary, in stability shoes, I have had the most pain and injury. I will admit I overpronate a lot so I see why they suggest stability shoes, but I can't stand it.

I was wondering if any of you running experts or smarty-pants could suggest what is best for me. I understand that stability shoes are probably the "healthiest" choice for the long term health of my feet/legs however, would running in neutral shoes be devastating for someone who overpronates? Also, do they just insist the stability shoes because they are more expensive and bring in more revenue for the store? thanks