Try the HVAC forum. A lot of good advice there. We are doing a MD with hide a hose setup with a couple of vacpans.

I have a VacuFlo it's been in for 12 years and still works great. My mom had a Vacuflo from 1977 and it was flawless for all those years and finally had to be replaced about 5 years ago with yep another VacuFlo. Great solid products.

We have a Dirt Devil Pro Series 990 central vac. It has fantastic suction! The house is only one year old so I cannot comment on its longevity but it has performed flawlessly. We have 3 standard outlets on each level of the house to use with an electric hose and powerhead. In addition, we have a 40ft hide-a-hose installed on our main level which we use most of the time since there are predominantly wood floors on this level. I hope this helps.

I replaced an older unit (not Beam) with a Beam several years ago when Beam could still be bought directly by consumers. Now they're only being sold through dealers, but in our new home, I went with Beam again. We've been in for over six months now, I've been very happy with the choice.
It met all my requirements. I did a lot of web research and they came out at the top.

Why not just have the motor(s) replaced on the one you've got for a few hundred bucks ?