I'm your size and even a bit heavier..I found the 200x a fun ride.
But I felt the 200x a bit lacking..especially when trying to keep time with my buddies on bigger machines.
Now I'm not a 2 stroke fan personally so I went to the 350X to get the extra power I was looking for..
Bottom line though for a guy your size, 200X vs 250R..my vote would have to be 250R!!
If you get the 200x you'll like it but shortly you'll be wanting MORE!!
Current toys..
1986 Honda 350X..trail bomb!
1985 Honda 250SX..my main mudder
1985 Honda 250ES..Back in Black Trike
Current non-trike toys:
1990 Honda TRX300FW
1995 Seadoo GTX
1998 Polaris Indy Lite 340(Nearly new looking)
1998 Polaris Touring 500
1998 Club Car (electric)