Nothing in that price range will touch the Picco 28.... probably nothing under 300 will touch it either.
STS made some screaming engines, but their quality has taken a huge hit and parts support is next to nothing. The Axial spec 1 engines are probably the weakest of the 28s available. Their 28 RR is a little better, but it is still a Kingstar. The LRP 28 or one of its twins, the Nsram 28 or SH 28, is fairly powerful, nice to run, easy to break in and tune. Glen
Doing my best to fill a 55 gallon drum with broken or used Nitro parts... 8^)