A very, very nice set of speakers ($50K new) , and are worthy of a higher level of electronics.
I'm sure you will get a great deal of suggestions for different makes/models and price ranges from other members. Just take your time and make your own decision.
If you really want to keep things simple, I would look for a preamp that has both a built in phono preamp and maybe a built in DAC. That way you can get rid of the Bel Canto all together.
If you wanted to stay with McIntosh, you have a lot of choices. For example, there is a McIntosh C49 on Audiogon right now for <$3900 which would match up nicely. Or a Rogue Audio RP-5 for $2675, or an Audio Research SP17 for $1700, or a Parasound P6 at $1100, or even a Emotiva PT2 at $475.... You get my drift here. You have choices. Match things up with decent cables, and you can have a system that you don't have to worry about for years and years.
Take some time and do your research. And in the end, if you are happy with what you have, that is all that matters.... and then, just enjoy the music.
- Jeff