I would agree that the vPad Rugged-2 is a safer bet. I would also suggest that in some ways it is the true successor to the venerable medTester ... I'm thinking here about the possible use of Autosequences etc., as well as connectivity.
I believe that the vPad Mini is marketed as an "entry level" tester (and presumably is priced accordingly). To be honest, I don't see the point of that - especially considering the limitations to 62353 testing mentioned.
The GMC looks very nice (like all their kit) ... but is possibly a bit too "advanced" for day-to-day field use. I'm not sure how it rates in the "automation" (Autosequences approach) stakes, either.*
Regarding Datrend versus Rigel ... I would say that could depend upon what other test kit you use. In short, for reasons of compatibility (and interfacing ... both with each other and with databases) I would stick with one or another of the "family". That is:- all from Datrend, or all from Rigel ... or all from Fluke (of course), or even Netech, or BC Group, Pronk et al.
The bottom line here is that, if I were again to hold contractual obligations for EST of medical equipment, I would go for the vPad Rugged-2 (not the Mini), and would build up its full utility with the various Datrend "apps" available to it. A modern day medTester, if you will.
By the way, I believe the reference to the medTester 5000c at post #7710 may have been intended as a joke (possibly aimed at Yours Truly); but, as we know, the medTester is from a bygone age ... and (as mentioned a few times before) I have never seen or heard of a 220 V version.
* IZYTRONIQ software ... does anyone know anything about this?