If the perk system is to actually work as an incentive to fly less common, or less effective aircraft then the only viable option is #1.
#2 would still have perk planes singled out, and to some degree would single out early war aircraft like the Bf109E-4 and Spitfire Mk I as easy kills making it harder for them too.
#3 is, obviously, what we have now and it works fine for most non-perk aircraft (La-5FN, La-7, C.202 and C.205 being exceptions), but it removes the perk system as an effective incentive to gather perk points, It works counter to this by making perk planes unenjoyable to fly. The perk icons and the perk price equal a kind of double jeopardy and its no fun to be gangbanged in an aircraft with slightly better performance that you spent reward points to fly. You can get gangbanged for free.
Here is what I'd like to see in icon changes:
C.202 = C200
C.205 = C200
La-5FN = LAGG
La-7 = LAGG
F4U-4 = F4U
Spitfire Mk XIV = SPIT
Ta152H-1 = 190
Tempest Mk V = TYPH
Me262A-1 = 262
Ar234B = 234
What it comes down to is this:
Is the perk system meant to limit the usage of top end aircraft or is it meant to stigmatize top end aircraft?
If it is meant to limit the usage of top end aircraft simply to prevent them from swarming the arena then the perk price is all that is needed. The F4U-1C saga has demonstrated this perfectly.
If the perk system is meant to stigmatize the usage of top end aircraft it works wonderfully for this, but begs the question of why the aircraft and system were added.