| TP, why don't you do the minimum to your current bike to get it past scruteneering and enter the Donny round in October. See how you like it. Then, make these decisions for next year.
You'll be able to get your bike ready for very little money and it won't devalue the bike because of the one race meet. I really wouldn't worry about the amount of power for the 750/twins race, at least not in the first few races.
If you're then ready to commit yourself (and considerable funds) to racing, ponder these decisions over the winter and maybe pick up an end-of-season bike for reasonable money. Just remember, racing a Ducati is very expensive. Look at Weeksy's dilema. An RS will be mega expensive! Racing a Japanese bike will always be more economical.
Again, why not get your feet wet and see how you get on. | 
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