Holy crap, you have GRF 90 now! That's awesome, and that's the model I'd be going for if I were doing my 4-years ago upgrade today (I went from Kensington SE to Canterbury SE). On paper, the GRF 90 seems like the GR-series replacement of the Yorkminster SE -- but with much improved aesthetics!
Several years back had the Yorkminster SE in home next to my (then main speaker) Kensington SE. The Yorks had amazing bass -- much better than Kensington, and certainly better than the Canterbury SE too. The paper specs show the Yorks as being best of the 3 down low, but paper & ink doesn't properly indicate just how much of a difference it sounds like in person -- and it's a lot! The Kensingtons had a sweeter midrange though, and the Canterburys do too, along with their HUGE sonic image (which is the Canterbury's strong point vs. Yorks). But honestly if the Yorks had a prettier cabinet, I'd regret not going for them then.
How do you find the GRF 90 midrange vs. the Kensington? I expect that the complete sonic picture they paint is much more amazing than the Kensington SE.