I use BAC 111-500's i got 21 of them.
119 Seats
I think there really good.
There in the same class as the B737-100 & 200, SE210 Caravelle Super 10B aircraft but BAC has slightly more seats, a slightly faster speed, longer range and substantial fuel usage. Up to you.
The 727-200 has a much larger seat compacity and in real life kinda go for the 200+ seating classes. (I think)

Oh but i think the reason why not many people choose BAC 111-500 is because there like 10mil more expensive then the others, but meh i like it.