I ran a Comet SBB-7 when I first got my ticket. Dual band 2m/440, and it worked really well. But, the plastic cover coils eventually died, and I replaced it with a shorter dual band SBB-5 with the metal coil in it. Very similar to a Larsen 2/70 base load with metal coil, but I prefer the SBB-5 due to the Larsen using a metal tab in the base vs. the Comet having a UHF type screw-on connection. It's a not too big, not too small antenna, and hits all the repeaters in my area easily. With the metal coil, it takes a pretty good beating without getting torn up. Since you're considering roof mount mag mount, it wouldn't be a bad way to go. They may offer a single band one at a cheaper price.