I just bought a high pressure Fabor steel 80 so I guess I’ll have to find a DIN conversion for my Titan regulator
You might have said it and I missed it. Your Titans are yoke regs, right? What is the valve on your new Faber? Is it really a true high pressure (300 BAR, 3500+ psi) valve or is it a convertible DIN Pro valve?
And by mentioning a converter, I assume it is a DIN Pro valve? Donut converters will not work with a 300 BAR valve - the DIN socket is too long, by design, to allow use of the converters. And yokes, by design, will not physically reach around and fit over the outlet of a 300 BAR DIN valve.
If it is a true high-pressure 300 BAR DIN, then replacing the valve with a DIN Pro would be the way to go with it. (on that size bottle, I like the Thermo valves, second choice would be the XS valve (but removing the fornicator knob and replacing it with a standard solid knob), and thirdly the Sos/Blue Steel - On full size bottles, the Thermo/XS are easier to carry the tank with (more to hold on to); on the lighter pony bottles I prefer the Blue Steel as the bottles are slimmer and its more inline with the smaller form of the bottles.
But if you have a low-pressure DIN (200 BAR DIN Pro) the $5 donut is an easy decision.
I buy a lot of used bottles (well historically did) that were usually bought by a new enthusiast that once they did their first post-OW dive trip, never got wet again and after tripping over them in the garage for 10-15 years finally decided to part with them. A lot of them have straight yoke valves (or other brand valves than the Thermo/XS?Blue steel) and they all get trashed and replaced with a DIN Pro (my reg fleet is half and half yoke/DIN (200 BAR variety)). Valve swaps are really, really easy and can be accomplished at the next VIP for the tank. I assume the new bottle is used so you'll be getting it VIPed? If it is a new steel bottle, then I'm guessing it is really a 3,442 PSI rated bottle - if so it will likely have the DIN Pro valve.