best plane = whatever you're good in that churns out perks.
Spit V & IX are both really popular, but I don't fly them so no opinion. I land the most kills in a P-51D, but it's crap perks. N1k's seem to have really good balance of performance/handling/gun, it's just not too terribly fast so I don't fly it. 190D9 is nice if you do alot of rolling & the WEP is really fast. P-38s are another great balance. Quick, turns good, great vertical fighting, lots of gas, jabo options, pretty durable, and the nose guns are really convenient. Twin engines are also pretty user-friendly to newer players. Only downside to it is bad view & the fact that it's hard to miss.
Ask most others in my squad & they'll say LA-7. I think it attracts too much attention, the ammo load is too small, & it doesn't have enough gas. That's just my opinion though, as there are alot of excellent LA-7 drivers out there
As for my personal pick (far from the best/most balanced fighter) is the 109G-10. Stupid amounts of horsepower, a 30mm cannon, and an airframe that punishes mistakes with a quick trip to the tower after a 450+ mph compressed dive... but it makes enough perks & is scary enough to be fun.

Indy007
ShiznotZ!