The TQ is the most basic, but is the one that can be upgraded to pro spec. It has C-hub steering.
The PBS has pivot ball suspension and a faster 8 port engine (of the .21 versions).
Generaly C-hub has faster steering with more throw, whilst PBS is more adjustable and slightly stronger. C-hub can be made tougher with CNC knuckles though it may be months before you break a cast knuckle anyway.
You won't go wrong with either
Get the cheapest one and any money you save spend on a rechargeable receiver pack and a good quality steering servo.