The ignitech is pretty awesome, it helped me a lot with my TR1 (not the turbo'ed one), to keep detonation and oil-temps at bay. So yes, definitely worth considering. You may also consider a coil-on-plug conversion (see my blog for details and suitable coils), I currently run Bandit 1250 plugs and they are really, really sweet. Especially as I've been riding a lot more in the rain, wet and cold than I wanted to in the last few weeks.
That being said, if your stock CDI isn't dead, I wouldn't necessarily replace it and go for a decent exhaust and proper roundslide carbs first, as the stock carbs REALLY kill power.
Hope this helps