IMO, a 125 two stroke is a super fun machine. I'm also 190 lbs with gear, so I know that the stock suspensions on 125's aren't up to the task. Also, power wise, you'll be asking alot of that eighth liter mill and clutch to get you around properly.
A 250 two stroke would be a better choice for you IMO. The two stroke will be cheaper to own and maintain, and there's still lots of parts and aftermarket goodies available for them.