[Noney]

Modern 3D TVs are great and their active shutter glasses (one lens closes in sync with the TV to show the "right" image, which is followed by the opposite lens closing to show the "left" image) are nothing like the red/blue anaglyph technology of yesteryear. The images are clear, crisp and flicker-free, but there are a few caveats which must be observed to get the most out of them, the most important being light pollution. You mentioned that you get a headache when viewing in the store and this is most likely due to the light pollution in the store. If you watch the TV in a completely dark room, you will probably find that you are able to "lock in" on the 3D image and you won't experience headaches. Light pollution is the enemy of good 3D.

I find that putting the TV in 3D mode tends to be an "event". If/When you first get a 3D TV you will have a honeymoon period where you will try and watch everything you can in 3D, especially when someone new comes over and you want to demo the system. After this wears off, you will use the 3D setting for special occasions. 3D concerts are a personal favorite of mine, and I actually just ordered a dozen different BluRays from Amazon this afternoon. The wife and I will plan the evening as if we're actually going to a live show, complete with a pre-concert dinner and cocktails.

You'll have to decide for yourself if you're a "3D guy" and make your own choices. Last time I checked, Xfinity was the only cable service that had a 3D channel (and that was a LONG time ago, so that might not even be true any more) so all of your 3D content would have to come from BluRay disks.