Hope you will report back on your experience with Racetech, this is what I am thinking of doing to my '11 as well.
Just finally, picked up my (newly) race-tech suspension-ed WeeStrom today. I know they put 1.00 springs in front with the Racetech Emulator and the new rear end. Have to say that I am really, really impressed with the change. It's funny how you don't realize how badly your old suspension has deteriorated over time until it is replaced.
First and most obvious change is the lack of front-end dive when doing a hard stop with heavy front brake application. Wow. All of a sudden the front just "sort of settles" rather than me fighting to keep from diving over the bars.
Second biggest change is how much more compliant and sure footed the front end feels going over speed bumps, pot holes and dead squirrels (etc) is now. Instead of feeling like a 1967 Cadillac with bad shocks on a Chris Craft jumping wakes and going "bump, ditty bump, bump, up-down, shake and rock" it sort of just goes bump and settles right back in with out any harshness or indecisiveness (for lack of a better phrase).
Third biggest change is simply how much better and less squirrelly the rear is now. Again, it is simply compliant, consistent and much smoother going over the same imperfections listed above. And while considerably firmer it is much less "reactive" to problems.
Forth and final biggest change is that the rear and front suspension feel like they operate in harmony and as one system rather then weak front springs occasionally working together with a rear shock. For you dancers out there the best anology I can give you is Swing. When you and your partner are both in-tune and moving together in harmony to the music. Rather than separately... but occasionally as one.
In summary, if funds are tight my personal is that the single (by far) biggest bang for the buck were the new fork springs and emulator. The rear shock (at least at 65,000 odd miles) while definitely a very measurable improvement (particularly over bad pavement, shoulders and curbs) over the original is something that could wait for another time.
Done together (though) the difference is wonderful and co-ordinates well.
That last statement is based on a friend's 2005 Wee that I have ridden quite a bit. He changed the front first (racetech and no emulator) about 3,000 miles ago and just changed the rear last week exactly the same as mine.. His bike has about 75,000 miles on it. In both cases front was the biggest improvement. Combined front and rear is a coordinated success.
YMMV, particularly if you still have very few miles on you bike. Again, if that is the case and I wanted to spend my money in the most efficient way possible I would re-spring the front forks and not worry about putting the emulator in. While the emulator does make a difference, it is in my opinion, much more subtle. The Rear can wait if necessary.
I apologize for this somewhat long winded essay; but there were several messages both on and off board asking for a review. So I tried to be complete. I hope it helps some of you in the decision making process.
BTW. I am 6'0 and 195-200 lbs. Vast majority of riding is one-up.