JMJ,
From one collector to another (and from what I have read and seen in the pics up here, we have quite a few pieces in common), here are my thoughts on Stingrays. Remember, free advice is what you pay for it!).
-The HH Rays are cool, but they use coil split combos to divvy output from the 2 pickups rather than coil taps and volume/blend. So the combinations are relegated to what Ernie Ball has chosen for you. That said, they do offer a broader variety of tones than a classic Ray and one of the preset tones is bridge pickup only, ala classic Stingray, so there you go.
-If you opt for the single H stingray (the classic), I would actually try to get a slightly older one if you can-- 1992 to 1995 to be exact. Basscentral should easily be able to source one for you if they don't already have one in stock, and in my opinion, these offer some goodies that you cannot get in a new model:
1) They had string mutes. Many people never use them, but they are good to have, and add to that, the bridge mass is greater to accomodate the mutes. I notice a difference but maybe I am imagining it.
2) You can get these older basses with all birdseye maple necks, including fingerboard. Definitely a brighter sound ala maple on maple and a better response I think too. Also, the Birdseye necks are cut a little deeper-- more of a 'C' profile which I dig, but then I am a big fan of old Aria Superbasses.
3) 1992 was the first year that the bridge saddles were cut and configured to give the Stingray's a perfectly straight stringpull from Tuner to bridge. Like on a Wal, and we both know how great those play! Not to say that the pre 92 Ray's aren't cool-- they are awesome-- but they are different basses with the 1992's and after being just a little easier to play, I think. So stay between 92 and 95 if you want the mutes, or 92 and 2000-ish if you want the birdseye.
As an obsessive collector, I advocate buying more than selling, as you will only regret it later, like with your Stingray. But if you really are thinning the herd, I am in the market for an RD Artist (as well as a pre 1980 Stingray) so if you are really looking to move one of yours, let me know.
Good luck with your search. I shopped for months for my first Ray back in 1995 and I decided that they were all good-- even the bad ones!
RBM