Either would fulfill the requirements of a commuter. The ZR7 has more room for add-on bags if you decide to take a weekend trip, as well as probably having better passenger accomodations. There is a wider range of aftermarket accessories to improve the performance of the SV, and the SV is probably a good bit lighter, which makes . I personally prefer 4s, but there is nothing wrong with modern twins. I'd say check insurance, and get the one which fits you best.