They also make a metric reamer that you will need for some engines in the future. No need to buy it now, just making you aware.
http://www2.towerhobbies.com/cgi-bin...&I=LXEGH6&P=ML

10x6 is on the small size for the Evo engive but will work.
The Evo manual http://www.horizonhobby.com/ProdInfo...nualUpdate.pdf on pg 5 calls for an 11x6 prop.