If your primary use is going to be a 420 mile trip three times a month you might look at the RV9 or 9A. It designed for cross country flying. Since it has a different wing than 6 or 7 it actually cruises a little faster on less fuel using the IO320. Of course my true preference is the 14 because of the roomier cockpit.
Just a thought.
Jim Harris, RV7A, 2nd owner, N523RM
IO-360, Hartzel CS prop, Older Aerotronics built panel Dual GRT Horizon WS, GRT EIS, Garmin 340, 335, Dual 430s, FlightBox hard wired to WS, Dynon D10A with internal battery (backup EFIS)
Retired - Living the dream - And going broke!