Duckie, you can pull the ABS fuse on the car and drive around w/ it disabled for a bit to see what you think.
IMO, the Subaru ABS kinda sucks in the snow, at least at slow speeds. I know there have been several instances where if I had been able to lock the wheels up in the snow, it would have stopped much faster than the ABS let me. However, at any sort of speed, especially in slippery conditions, the ABS is *way* better than not. If you have to get on the binders hard at say 40 mph in the snow/ice, there's a good chance you'll lock the tires immediately and go balistic... no control until you hit something. The ABS will at least keep the car in line. It's just at like 5 mph that it really sucks.
As far as weight savings, the only weight you'll save the that of the ABD control block located in the front of the engine bay on the passenger side. I've never had one out so I don't know what they weigh, but I'd guess they're under 15-20 lbs. Not a lot of weight savings considering the overall weight of the car. The biggest reason people remove the ABS is for *space* under the hood, not weight. With the ABS gone, there's a lot more room for intake piping and turbo bits.
So, unless you're planning on making the car a dedicated track car, or really need the room for a turbo or something, I'd just leave the ABS alone. Or at the most, install a switch on the ABS fuse so you can kill it at will if you're crawling around in the snow somewhere.