If you don't mind the aesthetics of the taticooled-up Ruger PC9, then that would by my first recommendation. Inexpensive, reliable, reasonably accurate and simple to operate and work on. That said, if you start opting for a bunch of aftermarket parts, your price could easily exceeed that of the Freedom Ordnance FX-9 (see below).
The Freedom Ordnance FX-9 is a "Tacticool" looking PCC right out of the box with either the 8"or 10" Barrel length. It is plenty accurate, and mine has been extremely reliable using bulk ball ammo right from the get-go. It is a hard-to-beat choice at right around $1400 equipped to run (less optic and BUIS) right out of the box!
At $2630 there is the Kriss Vector Gen 2 (+) in .22 LR, 9mm or .45 ACP. My .45 ACP has been a flawless performer and the rigidity of the new folding Buttstock is excellent compared to the older polymer Buttstock. With the improved ergos, serviceable accuracy and excellent reliability thus far, I cannot complain about the Kriss Vector.
If you care a great deal about looks and resale value, then I would recommend either the B+T GHM9 or the APC9, depending on your specific tastes. Both are utterly reliable and as accurate as any competing PCC. The GHM is more simple in design and less expensive at $2335 than the APC9 at $4770, although the latter ships with an Aimpoint T-1 for the extra $$, while holding the edge in the looks department as well IMHO. Each to their own, as either is an excellent PCC choice. As are also the B+T TP-9 ($3855 with Aimpoint T-1) and SPC9 at $4240 with Aimpoint T-1). All of the B+T PCCs are excellent performers. Accuracy and reliability being equally excellent, the decision really rests upon your preferred overall size and/or the operating system.
NOTE: The can is an Inert Display Model, and is so marked (and plugged).
If you are wiling to entertain the idea of adopting an entirely new cartridge, then the FN USA PS-90 may be for you. At a landed cost of approx $2500 CAD in its 16" Barrel configuration, you still have a ways to go to "completion" as a 10.4" SBR. Obtain a Barrel and Factory Muzzle Device from CMMG for under $500 landed and you can do the Barrel swap yourself if even moderately skilled with basic hand tools (incl Dremel). Add an Optic such as the Ring Sights "Secret Service Sgiht" for $600 and you are looking at around $3600 for a "Complete and correct" PS-90, plus however many 5/50 mags it takes to satisfy your comfort level. Ammo is actually not terribly expensive, all things considered.
The FAMAE SAF PCC can be a great PCC as well, provided that you have a source for inexpensive replacement plastic magazine bodies or the new $200 steel magazines from Tactical Imports. I have the .40 S&W version which comes wtih steel magazines and it has been a fantastic performer. It packs quite a whallop when shooting steel, so I can only imagine what it would do to clsoe-range varmints. Unfortunately the FAMAE PCCs are terribly expensive when they do occasionally come available for sale. Expedt to pay $3600 if you find a real deal, otherwise $4K(+) is not out of the ordinary.
At the higher end we have the Polish BRS-99, a PCC based on the PM-84 Glaubyert SMG. Available either Restricted with the factory SMG-length Barrel or Non-Restricted with the long, shrouded Barrel, the BRS-99 will set you back between $3600 for a bare-bones restricted model to $4500 for a NR model with spare Restricted Barrel, extra Magazines, etc. They are a reliable, accurate PCC with surprisingly decent ergonomics aside from the horrendously huge Grip girth.
At the high end of the food-chain there is the HK UMP-45 (SF) which will set you back upwards of $12K for an authentic example or approximately $7K for a Tom Bostic USC conversion (like mine below). These are surprisingly poor PCCs (and SMGs) due to excessive Bolt-Bounce and Perceived Recoil which is not offset by the flex-prone polymer Buttstock. Not a terribly pleasant shooter, but I had to have one in the collection..
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