would a .28 be controllable in buggy is the question, I think you would be over-powered, it would take some getting used to, plus as chad stated, it isnt legal for racing. I like my RB ws7iii, it idles all day long, and is really fast paired with a TTR 2035 pipeset and a RB#6 plug with Werks 30% fuel, and it doesnt seem to be hard to tune, I had it really close when I let Czech hear it, I was suprised how easy it was to tune and how close I Was to where I needed to be, and how well it holds the tune/ consistency is key for a n00b IMO 
I would say go Ace 1015 for steering, and Ace 1313 for t/b for servos.......however im using a futaba s9351 for steering, and a JR 590z for t/b(POS) I do however have a pair of Air 358/359's I will have in my possesion soon, lmk if you are interested in them
I would say go Ace 1015 for steering, and Ace 1313 for t/b for servos.......however im using a futaba s9351 for steering, and a JR 590z for t/b(POS) I do however have a pair of Air 358/359's I will have in my possesion soon, lmk if you are interested in them