The 109F is a good plane, but there isn't anything I can do in it that I can't do better in a 38. I used to fly it back when the perk limiter was on full and the high ENY PJ wasn't in the game.
But it's definitely up near the top of the list for medium speed TnBers. Fast enough to BnZ and reverse, but agile enough to out turn the real speeders like the 51, dora, typh, and yak.