problems picking a HT system due to ohmage

in my budget i have finalised what i want but the ohmage isnt matching up and i cant audition all this gear in the same store together to listen to it..
1/i chose a NAD T748 and wanted Monitor Audio rx6's (MAs are 6ohm and receiver does 8).......arhh
2/1 dealer sais he has paradigms w/ his NAD in store...never heard them and the nice ones are over my budget & have seen not good reviews on their monitor range
3/another NAD dealer has Klipsch rf62's (dealer too far away) the klipsch look good on paper ohms & db but they look awfully cheap and im unsure on the horn sound....
4/OR i could get the monitor audio's and buy a recomended Marantz 6006 that deals with 6ohms but im afraid the marantz wont sound as good as the NAD w/ audio....

anybody had ownership of these products and could comment on them and steer me in a direction..

using system for blueray movies/ps3 games/ dvd concerts and i listen to hard rock music/metal/classic rock/electronic/blues....and enjoy Long listening sessions and good solid individual instrument seperation..
planning to add a power amp down the road.