about a year ago i had the same problem as you

I went to a HUGE musicstore here in Belgium and played the digitals within my price range over and over again...
Until I concluded that the Yamaha was brighter, the 'heaviness' of the keys were better then roland and the others.
Roland had that awfull effect on their piano sound , like reverb or something, Yamaha was definetely sharper, brighter and for me better.
I bought myself the P-90 that time for 1200$ while the roland was more expensive