Over the last forty years, I rode both with and without and I agree with the above that ABS on the street is great. Although with some models it can be a hassle to shut off for dirt riding, overall ABS is essential for safety. How many times do superior brakes have to save your life to be worth the extra money?

Abs
 

I understand your dilemma and had the same many times. ABS is one of these feature which are expensive on the bike and do not really seems necessary due to the fact that you rarely use it but now when ever you will need it it will feel priceless and should you have a passenger I think ABS is even more important.It is also a + when selling the bike , I have and had ABS on plenty of my bikes and onlly needed once on my FJR1300 at 130 M/H 2 up on a wet patch, it save my butt and the passenger too trying to avoid a truck.
Skin graph cost more than ABS.

Hendi

My 1150GS had Servo assisted and ABS when I bought it new. I liked it on the road, but hated it when riding off road, as it snatched when braking at low speeds.
It failed when the bike had 85,000km on the clock, and would have cost $2000 or more to replace. I removed it, and regret ever buying the ABS model in the first place!
It's up to you, but I've ridin both and will stay without ABS in future.

johan

Just to fuel the fire...

I wouldn't want ABS even if the option were thrown in for free. In fact, if it were standard equipment, I'd be looking at another motorcycle.

Plus, I've never needed it...in 33 years of riding.