Sold Mac and B&W till 2001 so heard combo a lot and it's a good one.Depends on what price you want to go.Other speakers with true Brit sound to listen to would be Harbeth and Spendor.I like Silverlines but they are better with low power SS and tubes though 17.5 is a hell of a monitor like DeCapo.Like idea of Usher Tiny Dancer.But if B&W is where you want to stick thought CM7 with better oak than braced MDF of CM5 would be good if you don't want to shell out for 805S (I like them with Sound Anchors even if B&W stands look better).But if you can compare the excel;lent Revel M20/22 to 805.I think it edges it out at competitive $2K price point.Praoac and Dynaudio are good bets too.But don't knock idea of sub.Most people play them to loud.It may be that at low volume you want imaging from two way monitors but a good music sub like REL,MJ Acoustics etc. might be good.One speaker that would allow for very deep bass,have the imaging,and whose like like Usher is an over achiever it Totem Mani Two.Gallo's since mentioned are some folks dream ticket floorstander as it's not to big and delivers.Others don't like it but I think it's a good 5.1 choice.Me I'd choose Usher,Totem,Revel just from value standpoint.
Cheers
Chazz