Using digital gauges, that give a direct saturated temperature conversion, will help new technicians to think in terms of saturated temperature, instead of pressure.
Thinking in terms of saturated temperature makes understanding superheat, subcooling, and other things going on inside the system much more intuitive.
When you think in terms of saturated temperatures, it doesn't really matter what refrigerant you are working with, as the saturated temperatures will usually be close to the same for a given application, regardless of the refrigerant used.
The only reason we even look at pressure is to convert it to a saturated temperature.
Having to read pressures, and do PT conversions, is a distracting, diagnostically useless step, that doesn't do anything to enhance the understanding of the refrigerant cycle.
As with all things technological, if your reason for waiting to make a purchase is because something better will be coming along in 6 months, you will be stuck with not experiencing the benefits of the technology for that period, and in 6 months you will again be faced with the dilemma of knowing that something better will be coming out in 6 months.5.) By the time you are really ready to use these tools and have your own van something better will have replaced them on the market.
A micron gauge in the manifold is a fluff feature that I find pointless and annoying that I have to pay for.6.) Make sure any digital gauges you purchase have a respectable micron gauge. A bad micron gauge setup will turn your would upside down on large equipment like chillers.
The fastest evacuations are had with no refrigerant manifold or hoses involved, and it is best to have the micron gauge connected to the system, as far from the pump as possible.
This is doubly true on "large equipment like chillers."
Having said that, if a new guy is mainly doing start-up of new residential systems, etc., pulling a vacuum with a service manifold and hoses doesn't take that long.
If having a micron gauge built into the gauge set gets some people actually paying attention to micron readings, and proper evacuation, that otherwise have not ever done so, it is a good thing.