I wanted neck/upper back therapy more than anything else when shopping. (As I sit here typing with a stiff, sore neck, I'm just waiting for it to cool off so I can SOAK!!!) I looked at a number of tubs with "neck jets" that are out of the water, and often in these sort of yoke-like things behind the seats. For me, of the caldera, LA spa, coleman and D1 that I looked at, only the D1 had reasonable massage without face splatter, and even that was so-so. I ended up with an Arctic- it does not have neck jets, per se, but it still has jets pretty high up in one of the seats that does the trick better than any others did if I slouch down a bit.
I would just wet test all that you can, even if it means a drive. What works for me is so different than what works for others, and especially with those yoke seats, height really matters. The LA model that I tested had great neck jets, but unless I sat on my hands and stretched myself up, I just got it in the face. I'm 5'4".
