Well after much reading of the board and examples and posting many questions and then reading the responses, I have finally put my hand in my pocket and started to purchase some equipment for my cab (yet to be named).
The cab will be new build based loosely around an NBA Jam cab. Will have 3 swappable control panels.
1. big 4 player panel with 1P and 2P having rotary optical
2. 2 player panel with 2 spinners (Model 2) and 2 t-stiks
3. 2 player panel with 2 trackballs (well actually kidsballs)
All interfaced using cable connectors then into the I-Pac4 and Optipac.
This should be able to cover the majority of games for the time being, well most of the games I play the most.
Will be using TV with s-video which I haven't looked for yet which will probably be 60-68cm. Also haven't started looking at the pc side either.
Just have to wait for the various parts to make their way to Australia and then testing can commence for panel layouts.
I really wish the exchange rate was better as it's nearly US$1=AUS$2
which makes it hard but oh well I've paid the money so bad luck.
Want to thank everyone for their help and future help. Will have to get a website up and running to show progress once I get stuff happening.
Cheers
-cdbrown
PS: looking forward to some big NBA sessions.