The 50 SX is probably a good choice, a .46 will not be unlimited. I had a 45 ABC Super Tigre in mine and it wasn't as spirited as I'd hoped but enjoyable nonetheless. The upthrust might be a good idea. Mine had a terrible pull towards the gear in knife edge.

Apart from that it was a great flying plane. Recently sold it to make room for more planes... I wish I hadn't now that I see this