I had a '91 KX500 and my brother had a '91 CR500. We are both well over 6' and 200 pounds. Both our bikes had paddle tires only (we live within 5 miles of the dunes). We both loved our bikes and wouldn't trade for anything, so I don't think you can go wrong with either machine. Sadly, my KX was stolen and my brother sold his CR and got a CRF450 (which he regrets ).