Mike - I got a Black Horse SU31, which is the same as the Phoenix one. I used to fly it with a 46 2C and not the new plane has a TT61. The wing loading is much higher but manageable on landings. I enjoy the amount of pull the 60 sized engine has. For me I say got for an MVVS 49 or the OS 50 SX. The 60 sized engine gives me more vertical but not that much. If you do have the money then go for perhaps a Saito 82. I think that will be a great choice. In all honestly, it flies nice enough with a TT46.