Hi fatfish,
In addition to the great recommendations from Kush, I thought the Rio Windcutter 5/6 and Hardy Mach I 8/9 (not plus) also cast well on this rod in over/under situations spey and overhand.
I try to take advantage of the 'longer' (in this context) head lines when fishing rivers, or in salt high in the column in moving currents (in spots much like Bush Pt, Pt. Defiance, Point no Point, etc) and going with the shorter head lengths when stripping the fly quickly and close to agitate a strike or when fishing high-density sinking lines to get down.
I'm looking forward to fishing this rod for bonefish this year to further test some theories about using spey-setup casts in sight fishing situations on the flats. It's a fun little rod, hope you enjoy it!