Was looking to get a central vacuum installed for a new construction where our builder had already roughed in the ductwork.
Visited a few big box stores and central vac dealers and found GP Services had the best quality (Beam) and provided a good price.
He provided detailed advice for my needs, gave me very helpful tips since I was installing myself, and even provided the piping/glue/elbows etc all with the set.
Install was simple with some planning and works like a charm with lots and lots of power.
We went with the 275A model and the higher end Q series attachments. The 275A is much louder than the 375A we were initially considering but GP provided a muffler add-on that helped it quite a bit.