I currently have an OS .50 SX ringed engine, and am very please with it, but now I'm looking for an inexpensive .46-.51 engine for a second plane. I know guys at my club that have these engines, and are happy with them. It looks like the Tower .46 has a higher rated HP and a remote needle valve, but the Super Tigre is a ringed engine, which is supposed to last longer and be easier to rebuild than ABC engines. Both of these are about $79 at Tower.

Right now I'm leaning towards the Super Tigre, but I'm looking for advice/opinions.

Here's Tower's links to both engines:
http://www2.towerhobbies.com/cgi-bin...&I=LXJA86&P=ML
http://www2.towerhobbies.com/cgi-bin...&I=LXFV72&P=ML

Thanks!