I don't have time to get into research but the A7 is it, if I remember correctly. The A5 is the most nimble of the 190s in question. The A8 had a number of improvements that increased the weight into a new class of 190s, per se. The A7 retained the same basic weight and design characteristics though had a more powerful engine and added the 13mms in place of the little .303 poppers in the nose. So basically an A5 in turning, very little weight gain, firepower of the D9 with a couple hundred extra horsepower.
Basically, a souped up A5. That extra horsepower for no weight gain would make the A5 even more deadly in the vertical game and would likely lead to it being one of the premiere fighters in-game. Again, from memory.
boo