Hi guys, thanks for looking and for the recommendations.
I have considered valves but can't really afford them yet, it seems very expensive to do properly. Now that I'm bi-amping, however, I could happily live with amps with poor bass and low power as the bass is taken care of separately and my top end is quite efficient and high impedance.
As I say, the next step will be class A with transistors. By all accounts the JLH amp sounds like many a valve amp itself! I do yearn to try valves (and records) one day, it just seems very expensive to do well, especially the records as I already have a very good source.
Marco, I've added my location and some other details.
John, when you say mounting plate do you mean some kind of metal ring or extra baffle insert to mount the drivers on?
Cheers,
Simon
Listening to: modified Arcam Alpha, DIY preamp, DIY chip amp (top end amp), modified Carlsbro Powerline 800 (bass amp), DIY open baffle 3 way speakers (passive biamp for now)