Luxman 509 or McIntosh 8900

Hello all!

Been doing a great amount of research on getting a new "buy once, cry once" integrated amp..  Ive narrowed this down to the Luxman 509x and McIntosh 8900..  Ill be running this into a pair of Polk 707's which I am very happy with and prob won't be upgrading for 5-10 years.  

This would be streaming mostly and USB HiRes..  The McIntosh has the old DA1 module and I would get a separate streaming DAC for the Luxman.  Moderate listening levels.  The Polk's are 87db efficient and 250-300 watts recommended I believe.

Any feed back, suggestions would be great!!

Oh, and I have heard the McIntosh with Cornwalls and LOVED it..  I can not find a dealer to hear the Luxman..  So the Luxman would be a purchase off of suggestion only.  

- Brian