The Big Red will push an LST around fine. And in regard to your comment on a $250-300 engine - the Novarossi Legend 28-8 is $180 shipped if you get it from Novarossidirect.com. I was a devout SH/Mach/LRP/XTM engine fan for a lot of years... After I bit the bullet and bought some Picco and Novarossi engines and really compared the minute details between them and the SH/Mach engines did I find how much better the Italian engines are. Novarossi is cheaper than Picco these days, but are every bit as powerful and more than the cheapies. Do a search on YouTube for Novarossi legend LST and you'll see some videos of the bigger XXL getting pushed around by one of these nicer engines.
In the end, the Big Red will do the job though. When you're ready for an engine that tunes easier and runs stronger than the Big Red, try a Novarossi. They've never been more affordable - they're cheaper than the LRP!