I would say let them all stand on their own "merit"
IndigoBlue - though I do not call myself a DIR diver (I'm most likely the epitomy of an unsafe diver in the eyes of some, especially you based on some of your comments to me in previous posts), I took a DIRf class and plan to take Tech1. Therefore I will refute your suppositions based on my experience:
In my DIRf class -
-I used HP 120's, which will also be no problem in my Tech1 class.
-I used a DiveRite BP/W (had to remove the knob from rear dump) and will use the same setup for my Tech1 class.
-The only Halcyon gear I own is a can light - I got it used off ebay.
-My DS has no P-valve and most likely never will
-I was not REQUIRED to buy ANY gear to complete the class, though I opted to go ahead and buy some non-suicide snaps and a shorter SPG hose.
-My mask had a *gasp* purge valve (was told as long as I can clear it and it does not leak, it will be accepted). I have since found an exceptional deal on a low volume non-purge-valve mask that actually fits me - WOO-HOO!!
-I did not use an STA (duh!! I was using doubles - why would I need an STA?)
-There are
NO GUE-trained/DIR divers, much less instructors, in my local or extended local area that I know of, therefor I dive without them and have survived quite well, Thankyouverymuch.