Im a 16 year associated fan so I will have to vote for the b44. Besides a long history with the brand, I can get parts almost anywhere and at any time for the associated trucks and buggies.
Right now the parts for the b44 are a little harder to come buy, but in a very short ammount of time they will be plentiful just like there other cars.
Original RC 10T, T4, RC8Te, Tekin RX8. Losi Ten SCTE, Slash 4x4.