
You really should choose by yourself, I prefer the Pro. About the right placed exhaust, that isn't really a problem, because there are more than enough exhaust who goes straight under the engine (doesn't know the word for it). And beside that, such exhaust look much beter on DRD Pro's in my opinion.
70cc or 80cc? Again, it's something you should find out yourself, what do you want. I would sau, if you tune, do it right, that's why I drive 80cc, haha. (in a few weeks I mean(a))
And uhh. We all expect a lot of pictures when you've bought yours!