Interesting system you have. The Marantz receivers are actually pretty good. I use a 7702 Mk 2 pre in my AV system (the one that superseded it was a step down) and as I use two different amplification set ups depending on whether I am doing AV or just pure audio, I sometimes get lazy and leave the AV stuff (all solid state vs. the 'listening system which is tube) in the loop when I want to do a bit of casual listening and it is very decent. BTW, think about going to a separate server with all your music on it - I have around 4,000 CDs and for the first time I can actually find anything I want on my computer when I want to play it!
I haven't heard your power amp but have found several of the Bryston power amps a tad dry (I do run one of their preamps, a BP17, in a second system, and have an old 2B power amp - still a pretty good sounding unit despite the age, in my library system). I don't know that you need monoblock amps and can save some money by going for one stereo amp and as I am also in Canada, I think the Simaudio products are a good way to start looking, but don't discount the early Dave Reich designed Classe amps - they are once again up and running under new ownership and I was able to get one of my old Classe DR3 - VHCs overhauled with no problems.
There are a lot of heritage older amps out there that compare well with current stuff. I run an older Roland in the AV system, for instance and you can buy them for a fraction of what a new amp costs.
