I prefer the Tasco PDP#3 30mm. Why? Hmmm, well I've had no problems with them, it's the first one I bought (I'm a creature of habit), and I like the rubber around the outside of the dial. However they are not currently being made (unless the new owners started production). So you may find a deal on one new. On another note by far the most popular Red dot for Bullseye is an Ultra Dot. I haven't heard any complaints about them. Check these out http://www.ultradotwest.com/index.html http://www.eabco.com/sale7.html