Keithert,
Congrat's. Your posts in the last few weeks sounded like you were leaning towards the LS650.
As for bumps, The shocks are adjustable. Check that. Also check tire pressure.
As for MPG..... You were test riding the bike, you were probably not riding it for economy. Also I've been told air cooled engines will get slight less MPG in cooler weather. My last two tanks were 43 MPG and 48 MPG. But, it's been cold ... so when I got out the days it got warm enough I had a tendency to ride to get rid of cabin fever..
... and not for economy. My best was 54 MPG, but ... I still did some stress relief riding on the way home fm work on that tank.
T.Mack