Update on this:
4 years on HRT, orchi in late Dec 2015...Viagra and Cialis no longer produce good results, indeed they never did, at best it firmed things up enough to allow penetration without any size increase.
Although I do get pretty dysphoric, if I put that aside I can actually get "hard enough", but the size is still smaller than pre-HRT.
Like was said earlier, it's embarrassing. My wife makes do with whatever I can achieve, but *I* know what things were like before (even though she doesn't).
The big question (no pun intended) is, "if I could get as big+hard as I was, would I still want SRS, or would I keep the male parts?"
Fortunately I have 15 months to think about it and to talk it over with my therapist. I'm inclined to get SRS, mainly because I don't like the dangly bits at any time other than full-boner+orgasm (and the orgasm isn't the male one, it's a female surge but with a large clitoral O).