Got a pair of GRFs. Had the pass, moved on to the LTA UL and pre separates and haven't looked back. A glorious sounding pairing. Tannoys work very well with these amps. More bloom than the pass, and will sound a bit heavier in the bass department (not as tight). Amazing flow and foot tapping ability. Very lively sound, hard to put on as background noise with these amps. Little less pin point then the pass or other solid state gear.
Own CODA gear for solid state now. Enjoy it more than the Pass personally. Some of the FW stuff is glorious tho, really like the F7. SIT 3 not a great pairing with tannoy imo