I don't think I mentioned it before, but I was thinking of rebuilding my old forks, but this would be better. I am about 190, and well over 200 with gear and my backpack for school. Either way, rebuilding SBK forks seems a better investment than rebuilding the stock ones. Now I'll just need to address the rear. Is a spring only replacement usually enough to improve normal daily riding? I'm not sure I want to spend 500 on a shock at this point.
What type of riding do you do? Assuming you are like the rest of us, it's probably mostly weekend warrior stuff, with some spirited jaunts through some twisties now and again. If your current forks are in need of rebuilding, consider that SBK forks would likely need rebuilt sooner rather than later if you get a set that is used. It's a tough call, but a proper rebuild by folks who really know what they are doing could be just as good as an SBK swap. Proper springs, proper oil, and some upgraded valving — while not adjustable — will make the bike feel completely different. To be quite honest, I've not once adjusted my 999 forks since putting them in. I checked the sag, it ended up being spot on, so I left them alone.
The benefit of the swap for me was that I had ONE day of downtime, and was back on the road... Rather than pulling the forks, sending them off, etc. etc.
Maybe talk to some folks at Traxxion Dynamics or RaceTech, or see if you have any local shops. I'm not sure what's out there regarding valving, etc. for your bike.