Take a look at the Winchester Super X3. I have heard good things about the Super X2, and the X3 has got to be even better because it is just an improved X2. And they affordable guns (for a semi-auto anways). If I were you, though, I'd look for a used Benelli M2. It's basically the same gun as the SBE II, but it's only chambered for the 3" mag.