Thanks so far guys.

Diki I will not consider the BK9 for the simple reason that I do not currently want to spend more cash on equipment. ( the othre day I purchased the KRK RP 5 G2 actieve studio monitors, great nearfield monitors by the way.
And as to carrying stuff, it all remains stationary here in my room. I don't want the intracacies of the BK-7m module and I always want to keybeds to play on. As this would be an exchange of keyboards with no extra money expense involved the only thing therefor is whether I will be better off with the E80 than my current PSR750. I love the acoustic piano on the PSR750, better than the korg pa800 but would expect the E80 to have an even better acoustic piano ,particularly if I purchase the extension board. A month ago I had the E50 for a short while and though not impressed by the factory settings I realized its potential, hence my interest now for the E-80.
Another great feature of the E-80 is of course the Dynamic Arranger which apparently was discarded with the new BK series.
My very first arranger was the Roland E70 and I recall programming a lot of Dynamic Arranger values on that one !!
To the best of my knowledge the E80 has NO Pads which is a minus. And I wonder if the acoustic guitars in the Roland and things like trumpets etc. can match the new PSR750 ????
Anyway the guy interested and I have both agreed to give it a few days'thought before rushing into things. But your further views on all of this will be very welcome.

regards,
John