The V is only 3 mph slower than the IX after the change from 12+ boost to 16+ boost. I dont care one way or the other, if the P-47D-11 is available I'll never fly a Spit.
As an aside, either the F6F or F4U-1D should be enabled on the CV when it gets added. We never have the FAA represented in ETO sets. I can only remember once, and that was in AHI, but it added a nice twist on the typical ETO '44 set.