I would go with the B-STOCK JVC RS-40 and FAST before they sell out, you still get ok 3D for many movies from the JVC, but you get ABSOLUTELY mind-blowing 2D quality. I mean the B-STOCK RS-40 absolutely destroys the 2D PQ of the Optoma hd33 and Epson 3010, it is night and day. The JVC can hang and sometimes even beat projectors costing $5000+. It does also beat the Epson 8700ub by a margin. The RS-40's 3D is not bad, heck on dark movies in 3D I actually prefer it over some of the ghost free projectors. It is just that in really bright movies (which is most 3d), there are going to be scenes which ghost. It doesn't however ruin the experience for me, and I can wait on getting another 3D projector until later because my JVC RS-45 satisfies me completely for now (in most cases), except for gaming (in which I use a cheap DLP for that), and some occasional yellow push in the color (which can be fixed with HTPC or VP once I get to it).
3D is really cool sometimes, but the amount of content is still lame for now, and it's very expensive to buy the disks. To try to put this into perspective, I watched Resident evil 3d (boring movie, good 3d) and any ghosting is very rare on the JVC and hard to see, it's great. In another movie like IMAX: Under the Sea, it's a little more ghosting on some scenes, but still bareable and still fine. There was a scene where a fish (CARP I think) was right up to my nose and I swear I was a little freaked out (kept telling myself, no this fish is not real). So 3D can be awesome, but it's also not bad on the JVC, maybe on like 25% of titles it is just really bad, and on 50% of titles somewhat (that is my guess), but probably half the titles you barely notice any ghosting (as long as you aren't streaming SBS from Vudu or watching the crappy cable channel, talking all Bluray here).
The Optoma hd33 has better 3D and FI than the RS-40, the Optoma is a tiny bit brighter (not much), Optoma easily wins in gaming, but the JVC kicks it to the curb in most other PQ respects. For SCI FI type movies especially, there is a world of difference. We are talking about a $3000ish projector vs. a $1500ish projector, and the difference does show in most content. We are talking 50,000:1 true on/off native contrast vs. 2,500:1 on/off on the Optoma (and probably even less on the Epson 3010). Even though the 8700ub on the other hand can do high dynamic contrast, in real world terms the black levels still are a tad behind the JVC, but the JVC is more film-like as well (JVC has POP/PUNCH and film-look at same time, that is why I love it).
Most 3D projectors in 2D mode (for all practical purposes) are basically equivalent to 120hz since I am guessing most will do 5:5 pulldown (or similar equivalent) when doing the 24px5 algorithm. As far as 3D ghosting, the refresh rate isn't a perfectly known measure, but the faster panels are helping for whatever reason, but it isn't a 1:1 known relationship. What is probably known is that one reason DLP's ghost less is because of the lack of pixel response blur (separate from frame rate refresh speeds), as a DLP can switch a pixel from full on/off 500 times or more faster than the other techs, whereas the other techs may create a slight trailing on the pixel response (hence some overlay like effect as in the pixel is partially in old state or new state or inbetween).