Jack- I've got mine strung with VS gut mains/RPM crosses. Great combo for this racquet. You can adjust tension accordingly. The gut really softens up the frame. IMHO it gives the racquet the best of both worlds( controllable power and spin)
I also tried this racquet with a full bed of Tecnifibre X Code and thought that it played well also.
It was recommended to me to try Solinco tour bite mains with Gosen crosses by someone who has tried it and liked it