That's weird... they state SV650SF. But in all the other text it's reffered to as the SV650S like it always has been. I'm willing to bet it's a typo... a rather big one.
ABS models are a bit more expensive, not a bad idea but bikes haven't had ABS on them for 100+ years. They've done well without them. But a little aid here and there won't hurt. It's rider preference, which is why manufactures offer with and without.
They're good bikes, those Suzuki's. Quite the 'cult' following. They sound awesome with an aftermarket pipe. I've been considering one for years. Infact, I was looking at buying one this last summer. Untill I saw the Triumph Daytona... then I sat on it... and well, after a weeks worth of homework and telling myself I didn't need the expensive Triumph and that the Suzuki was the better buy. I rode home on the Triumph.
It's hard to argue with 364lbs and 123hp with 54ft-lbs. Doesn't sound like much on a car forum, but in the bike world... izzz pretty good!
Here's the main thing about bikes these days, especially the Japanese bikes. They're all built pretty damn well, have good tight tolerances and you'll be hard pressed to find much wrong with them. There's always the given lemons out there for sure, but with bikes it seems less likely.
Not to mention they're all so similar in performance, that to the average person you won't really notice any differences between Brand A and Brand X. Just choose whatever fits your best, or what color you like, or what body style you prefer... they're that close.
Good luck, and if you haven't taken it already. I suggest taking a rider safety course to really learn some basic tips on riding on the street. Even if you've ridden dirt before and know the concepts, it's still a good idea. And it's cheap!
Stay safe... and remember to wave at the other bikers. We're all on the same team regardless of brand of bike. It's us Bikers vs Cagers (Cars).
Oh, and Track riding is the shit. Period.