The V-10 is an XLNT motor.....It was upgraded significantly in 2006, higher torque/HP and a better transmission....
If it were me, I would focus on 06 and later if it is in your budget.....Pre 06 was good too, just good improvement in 2006......
Steve and Liz
Elko, Nv and San Diego
2017 Lance 1172 truck camper