@The Big Picture
About Ghosting:No real ghosting, no. With normal viewing, I doubt you will get (much) ghosting, unless you are viewing things with a TON of contrast AND your head is tilted > ~20deg (educated guestimate). Even so, you can tilt them slightly like Derek mentioned, which isn't a big deal... I only notice ghosting when there is light next to dark, and I take off the glasses and tilt them extremely... and I'm even projecting onto a white sheet suspended in air right now, which
should be exacerbating the problem.
There are more glaring issues that pop out first before ghosting. Primarily I mean the contrast and brightness loss with 120hz and glasses on, but this can also be compensated for by tweaking brightness/contrast on the projector to have even colors (nothing blown out, but probably really dark), and then increasing the gamma only in game. This works well for me in GTA 4.
Note: when you turn on the GT750's 120hz, you lose a lot of brightness/contrast/color accuracy. I was disappointed at first, but at this price point it still is better than all the other options I've read about.
About Resolution:720p is fine, but for gaming it's only just fine. I wish I could run 1080 (and preferably i would run 1920x1200!), but 3D requires so many frames per second to be pumped out that I have to scale down the resolution anyway (I'm running i3 2120 with Crossfire 5850s, not top-of-the-line, but no slouch either).
I'm happy to go 720p however, because low framerate 3D gaming sucks, there's no getting around it. You see more rainbow effect in low framerate 3D as well, and is more headache prone in games where you turn a lot (when you turn, your eyes are stair-stepping along the turn 1 frame apart from each other, which funks with your brain == headaches/eyeStrain).
If I didn't want to push the industry towards better 3D (and have fun doing it
I would probably look for a low latency 1080p projector. The GT750 and H5360 are the only ones
(that I know of) with "0 input lag", which is the only acceptable option for me since I do FPSs mostly.
About 3D Settings:
Be Patient!!! Try things, experiment. Expect to spend 30 minutes for EACH DIFFERENT GAME changing settings until you get something you like. Each game is different, there is no catch all convergence/separation setting. This is because each game uses a different viewport/FOV, and even dynamic ones (like GTA4). USE YOUR PRESETS. Set one for close in, one for medium (or "lazy" mode), and one for far out. I haven't found the iZ3D driver's autofocus to help that much.