Just a bit of backround for anyone who may of forgotten or doesn't yet know- Sour (the mare in question) is a four year old miniature horse. She has been started to driving lightly and has about 18 'rides' on her. She now confidently and quietly performs basic maneuvers. We're still working on getting her to really power herself off of her haunches, but that's more of a matter of muscle building than anything else.
I'm currently driving her in a single jointed half-cheek copper and nickle (fairly cheap) bit. She doesnt necessarily seem to mind it, and doesn't play with it or evade it, but I'm just not really happy with how it feels and am looking for a higher quality bit anyways. I'm hoping to find something in the $25-40 range and since I'm not a huge fan of the mechanics of the type of bit she's using, I figured that I would see what you guys had to say. I'd like something gentle (she's very soft and supple and I'd like to keep her that way) but designed for driving . Thanks guys!