Suzuki Dual Sport 

As a multiple owner of the DR line, I am admittedly biased.  I started out with a 1992 DR250S that I bought as a leftover in 1993.  I replaced a 1978 Honda XL175 and could not believe how much better the DR was.  Of course it had 15 years of technology and was brand new.  The only complaint I ever had through 10,000 miles was the lean running and hard starting.  In 1999 I bought a 1998 Suzuki DR350SE.  Once I got a taste of the electric start that was the end of my 250.  I sold the 250 and never looked back.  The 350 was still lean and I dropped a washer under the needle to help on the low end.  If you haven't done this yet, you would not believe the difference it makes.