if u could get a v7 new i would go for that theres a very few still selling if ur lucky u may find one v9/v10 has problems with the BA chip overheating and killing the unit i think its hit and miss my virst v9 did this but my new v9 dms3 is still working for now and wal-mart will take it back if u ask for a exchange its easier cause when asking for a refund they want to ask 50 million ?'s and they need a CSM up at the front they look at it closey match the serails and all this and that just to get a refund unless u find a dumb teenager working at a store in the returns then it wont be a problem
if u can look at the packing Foam = v9 Cardboard= v10
u can look through the hole that reads the seril number to find out