Heres my 2cents:
Why did I choose a new 09EC200?
1st: The price Tag, its just that little difference that makes it easier to swallow from all the others(250/3002t) and even more from the Japs(F's), Italians and Austrians given the current Global Economy(and personal).
2nd: Its light, fun and easy, that the key attribute of this bike. The bike Labors for you and not the opposite. Yes 450MX power is awesome, but barley remember braking a sweat on this 200.
3rd: It keeps me sharp especially riding with 450, slight mistake and your left in the dust but every now and then I like making them sweat to pull away from "that F***** mosquito" behind them
4th: The GG brand seems to be growing to a broader after market parts to choose from, especially on both sides of the Atlantic.
and 5th: Its good old XX century proven technology(other day mate was bitching about a faulty efuel pump that Huscvarna gives no warranty and asked him 1K for a new one, hummm??? I never heard of a broken carburetor!!!)
and as for the 200/250/300 discursion:..
If you are a racer(even if occasional)? then choose the class your probably have better ods of success and not the bike displacement( but yes 250 to 300 is a quickie upgrade/downgrade), but remember a good rider is fast on any bike( R.I.P. Mika Ahola).
If you are a enthusiast and race occasionally then choose from style, abilities AND BODY BUILD(39Hp of the 200 is Good Enough for my 11 stone/5.5ft)
In thee 2 years of 200 I can only 2 reasons for buying a bigger displacement:
It does fall into the small bore 2t, so you do have to rev it more(and in the right gear(some times dubledown/triple shift+ clutch (lol))) to get the job done thus an early piston/clutch wear compared to the 250/300( mine is staring to feel weaker in the low rpm but feels as strong in the hi rpm)
ENGINE PARTS: I found that MOST piston manufacturers list 250/300 GG kit's but not all list 200 kit's and sell them more expensive then a 250 ???
so that makes me wonder, is 250cc the mother of all displacements, history says so and so does what you can do with it, tame it down or boost it with just top end it to 300 for as less 450$ kit's that I've seen for sale.