There is a fairly active power cat forum I know of and Pat Reischmann, one of the founders of Manta is a regular contributor. I was sad to see both companies shut down -- the Manta 44 and the PDQ
34 are terrific boats. The Manta 44 is considerably larger than the PDQ 34 inside -- you may want to look at the PDQ 41 for comparison.
powercats are kind of homely to my eye but I think the construction is decent and you can pick up a used Endeavour
44 for about as much as a PDQ 34.
The PDQ's seem to sell quickly, at least the late model ones. After talking to the builders and sales people for PDQ at endless boat shows, I have gotten the feeling that the PDQ's were significantly upgraded every year of production, and if you prefer the PDQ try to buy as recent a vintage model as possible. I love the PDQ 34, but it is just too cramped below for anyone above 6'2" with a beamy build.