I have an ARC LS 25 MK 1.........

I also went the way of nos(tungsram)in my ls25mk1, not a lot of money for a big improvement in performance, less noise, better base&mid range a nice improvement over the stock sovtek.

Do you a suggest that I change my 6922's in my ARC PH3SE phono per-amp as well to NOS??? If so, any recomendations?

J_K, I heard that same setup a couple months ago at a local shop. Your right, made me want to go into debt.

Rwd:
I am using the VT100 MKII with my LS 25 MKI also. The combo with the NOS is awesome. A set of four 6h23 NOS will cost about $100 ($25 each)

I am running my PH3SE into my LS2B Mk II. For now, I have a matched set and a single (total of 3) Amperex 7308 white label (circa 1965) in my PH3, and a Mullard 10M 6DJ8 in my LS2. If you are interested in finding out more about my system, you can see it listed under FrankC on Audio Asylum's member systems listing.