I didn't have much luck with the Crown, don't be put off by that though, mine just leaked but I have owned all of them and the best flavor for me goes to the Crown, The Starre Pro is very close but has an over engineered design...after you get over the shinyitus
The Freemax is also a good tank but the flavor isn't quite as good, the only difference between the V2 and the V3, is that the V3 has an afc on the drip tip, personally, all those do is mute flavor.
They are all good tanks but the Crown gets my vote..
If I were in your position though, I wouldn't buy any of them, I'd be ordering a SMOK TFV4, the daddy of Sub Ohm tanks...or even pre-ordering the Black version
@Stinkytofus , oh it's you lol, don't you own the TFV4 ?