Accuphase E-470 or Luxman 590ax II ?

Hi, I have the opportunity to buy either a Accuphase E-470 or Luxman 590ax II for nearly the same price, the speakers are Graham Audio LS 5/9 (bbc speakers) 
The 470 I know is powerful enough , and I been told that the Luxman is much more powerful than the 30 Watts would suggest and should drive the 5/9 without problems in my 18 kvadrad room.
I don’t have a opportunity to try the amps at home.
From a sonic standpoint, which one would you recommend ?