BUY BUY BUY!!
I got a 32/36 recently and it is a huge improvement over the Hitachi. It works far better at higher revs and if you have the right air cleaner the new induction noise is wicked! It may not be too much of an improvement at lower revs but it certainly sounds faster. Everyone seems to complain about idle and low revs with a Weber but mine is smoother than the stock and I have had no problems. I havn't hooked up the choke yet and it still starts on frosty mornings and idles right away. Plus I havn't tuned it yet, I'm actually running a 32/38 carb as the secondary has been bored for my Formula Ford and it is running a 200 jet on the secondary. Will tune soon tho as the fuel bill is rising but there are no hesitations or anything in acceleration.
My advice is to buy it.