Ditto to barrelracinglvr.
If your horse works fine in a plain snaffle, there are no rules in barrel racing that dictates what bit you have to use, so just use the snaffle for barrels.
I personally do like the Wonder Bit, when it works for certain horses. However the only thing to be careful of with any gag bit is that the horse can kind of "get used to it" over time and not respond as softly or swiftly.
It worked fantastic for my horse, combined with a German martingale, to teach him to break at the poll. He was having a hard time understanding what I wanted, and I tried that and boom! He got it. So I'll use it from time to time as a tune up sort of thing.
As far as saddles, you'll want to stick with name brands such as Billy Cook, Circle Y, Tex Tan, Double J, Bob Marshall, Martin, etc. Often, you can find these saddles used for a little bit cheaper than new, but they do hold their value very well if you take care of them.
∞•*˚ Βгįťţαňγ ˚*•∞
It is not enough to know how to ride; one must know how to fall.