There are lots of good releases out there. However, Carter Enterprises probably makes the greatest variety and right up there for the best quality. They make true back tension, back tension with safties, thumb button, thumb and little finger, and true trigger releases. You can't beat them for smoothness and adjustability. However, they are a little pricey. You also asked if a new release would change you bow's tune. It will not change the tuning of your bow but you probably will have to adjust your sight. Your point of impact will almost certainly be a little off. There are very few releases that impact the same. A release is a very personal thing but I would suggest that you try several and buy the best one you can afford. They last a long time.