Myler bits are good, but you'll need to transition her from the snaffle. My general recommendations for bitting are in the link in my signature. You can, theoretically, use the same bit for gaming, but you may find that something else works better.
Under $80 Western pads....you should go for natural fiber (wool) when you can, and I bet you can find a decent one under $100 (Diamond Wool is a cheaper quality brand). You can find an OK synethetic pad for closer to $40, but I really wouldn't recommend that.