soft tips have a sleight tendency to suction on. For bill switches a hard tip would be my recommendation.
I would have to 2nd that. A hard tip is better for the bill switch. The soft TT the bill tends to stick. You dont need to spend alot of money on a TT. I have all kinds of TT and the Vernet is the one I use all the time. If you want to do the bill switch get the Vernet reg. If you want to make silks or bigger loads get the Vernet x large. If you live near a magic shop your best bet is to try some on. I had to get a few before I found one that works best for me. It should only come up to middle of your thumb. You know just before in bends. It will look longer than your normal thumb but no one should see it from the side anyways. It will allmost never match your skin tone inless your lucky, but not to worry I seen someone use a red TT and never seen it. Buy a D.V.D on them for some great tips. Hope this helps.