Hey Admiral --
Yeah, the WR250R and TW200 are both great. The WR is definitely much, much better for banging out a few highway miles in route to the dirt. On my WR250R I can essentially keep up on pavement with a buddy who rides a KLR650. Once we get to the dirt, the WR shines.
TW and WR are both good on dirt/rocks, just different. TW has the low seat height; WR much better suspension. TW's fat tire is better on sand, but woefully underpowered.
As you say, don't ever sell your TW. Makes a great family and friends bike if you are ever inclined that way.