Nice grab for C$175 ... cabinet has sort of that StarGate look, but is cut too straight ... could be a homebrew (I own two non-factory cabinets made in SW Ontario, although neither is an upright).
As for capkits, I will be ordering mine from Bob Roberts when I finally get around to it ... I have a chinese monitor (in one of the homebrews) that I have yet to identify. You could buy all of the caps on your own, but I like the convenience of a fully assembled kit.
While I haven't yet capped any of my own monitors, my understanding from the CGCC guys (most of whom seem to be in London, Cambridge, St. Thomas, etc) is that, once you get past that initial fear of discharging the tube, it is easy stuff (just watch polarities).
JAMMA is a standard for wiring arcade cabinets, comprising a single harness to handle video, audio, coinage and controls. It allows easy switching of games in a single cab (pinout is the same, so just have to pull the board and put in a new one). I would not be at all surprised if your cab is already JAMMA.
If so, then you can interface your controls directly to your PC via a JPac (interface board designed to link JAMMA cabinets and PCs) and ArcadeVGA (video card that can drive an arcade monitor). [You'll still have a bit to consider and there are other options, but this would give you a start].
http://www.ultimarc.comOne interesting issue for you to ponder is monitor orientation ... yours is currently vertical, which is great for vertical games (e.g. Galaga, PacMan), but will be tough to handle for horizontal (most fighters and scrollers). You can rotate the monitor to horizontal, but then your vertical games will looked squished.
Cheers.