On a journey for the last couple of years

@peterrock Given the low frequency range on your speakers I strongly agree with the recommendations that a properly setup, stereo pair of musical subs will result in a much larger benefit than upgrading amps.  For a music focus I have become a big fan of REL subs based on their ability to seamlessly integrate.   REL's website has a selection tool for the recommended subs given your speakers/room that may be helpful to you.  For my system I have a pair of the No. 31's but also think the Carbon Special models are a great choice.  If you're comfortable with used, the previous Carbon model is showing up for some pretty favorable pricing.   

Ever consider bi-amping the Olympica 5s?  You could put a real ballsy amp on the bass, and an amp (or monoblocks) with a big sweet soundstage on the midbass/treble..

I’m a McIntosh fan(see my virtual system) but  would do the following in this order:

1. Room optimization 

2. Dual subs. I run two Legacy Audi Foundation subs. Made a gigantic difference.

3. Speaker placement and alignment in conjunction with #’s 1&2 

4. Get the MC611’s. Heck. Just get them anyway. Hey. I’m a Mac fan. 😎

Knotscott to be honest no, what would I need to accomplish that? I can google :)

Jfrost thanks for making me laugh... I'm a Mac Fan too but the tariffs are a deterrent, unless of course they have been lifted, I will check into that  

I’m running stereo rythmik E15hp2 and they’ve never let me down. I demoed the rel s/510 before selecting the rythmiks. They are servo controlled and will do pretty much anything you ask them to do, including rearranging the pictures in your walls