RE: Pheonix Strega
I did a review on this plane as well over at another RC Group (blatant hint there). It's an easy assembly and a very nice flyer. The 46AX will have no problems. I used an OS 46 FX on mine and a Master Airscrew 10-6. A 10-7, 11-6 or 11-7 should do the job as well depending on what your engine likes.
The plane flies like a dream. Everyone who has flown it says the same thing, that it's fast but, it's also comfortable.
The page of the printed review in the above post agrees with my findings.