Yeah, ABS on *all* R33s is an option.
ABS was a primary concern for me, but the perfect car came up - but no ABS - never looked back. If you have the opportunity to get it, I would because it's safer, but don't hold out for it.
I reckon the first month is a bit of a milestone if you're not used to such a powerful car, so just be careful - ESPECIALLY IN THE WET.
You will hear everyone tell you that and you may not take heed, but it rained the first day I got mine and I lost the back bigtime. I was lucky no one was in the lanes to the left and right of me