The SY98 and SY98H are both balanced and with the 98H being slightly more balanced. No, I'm not crazy, yes I know what the websites say. I have 3 Helmers and had the synergy as well as swung a few other synergy's. With that being said, neither of those bats will last more than 800 hits with that ball. The SV98 Salvo has a the smaller barrel and an EL to it. The SV98 is also much more durable than either of the synergy's, although the synergy's will perfrom slightly better.
I'd buy a SV98 if I was using a ball with 375 compression or higher.