4 keg Kegerator parts list help

[jdk972003]

I am doing this backwards then most of you. I am starting with a kegerator first then going to try brewing. So step one was a kegerator and setting it up right the first time for long term brewing goals. Planning on 4 taps from one kegerator.

Here are my questions.

1. My lady has requested the occasional ability to put a Diet Coke on tap. How would you recommend setting up the CO2 side? 4 regulators? Or two with a 3 way tee for the beer? Do I need a bottle pressure indicator since the co2 will be inside the fridge? I like the premium ones here but I need the regulators to be as close to each other as possible. These premiums look widely spaced due to the nipple in between. Opinions on premium vs standard, alternatives?

2. Can someone help with my checklist? I got the basics but need help on the details. I want to make sure I order everything i need. An accurate "shopping list".

I have listed currently:
T tower SS
4 perlick faucets SS
4 3" or shorter shanks SS
3 LP regulators premium
1 HP regulator (directly on bottle) Is there a premium?
4 Corny to Sanke conversion kits
Air hose - 3/16" ~20ft
Beer Line - 3/16" ~20 ft
Corny coupler (gas & beer)

I already have the kegerator/co2 bottle/ 4 various couplers types

Any help is appreciated! Thanks!