Could someone explain the differences between the Sig 229 with regular grips and this E2 thing? First off, I'm looking for a .40. I handled a new Sig 229 .40 and had grips that I'd never seen before on a Sig, kind of a rougher texture and darker black color. Is this the E2? This gun was priced about $100 lower than any other new Sig I've seen around town. Is the E2 version supposed to be cheaper? Any insight would be appreciated. Thanks.