I have now been able to test both types of 3DTV and it would seem that my OH can't get along with active as it gives her a headache after only watching for a few minutes but she was fine with passive 3DTV.
With this in mind what are peoples thoughts as I think both Samsung and Panasonic are active 3DTV's, I am left with the LG, or are there still better alternatives?
My other option is to wait until the 3DTV passive/active issue sorts itself out and I just but a really top notch 40 or 42" for the time being but if so which one?

Thats a shame that your other half gets headaches, Where was your Demo from ?, Most Demo's from big chain stores are pretty awful to be honest. I was demoed a Samsung UE55D800 LED and was given the wrong glasses at first, then a pair which had an almost flat battery. Also when Demoing Active 3D sets the Store lighting will almost certainly create 'Flicker' which could lead to the uncomfortableness.
Is there any chance you could try again, maybe if you have friends with an active set ?.
If your looking for quality 2D and in particular Blu-rays i would think twice about the LG LW550T, I had 3 of those and returned them all for several reasons, Bad Corner clouding which seems an edge lit LCD traight and my last one had awful Dirty screen effect. On the plus side the 3D was bright and great for animated 3D movies, however i found that 'real 3D' was underwhelming and lacked sharpness.
I would say at 42" one of the Panasonic's would be the best bet this year. CES is just around the corner now so you could wait a while and see what late spring brings to the table !.
Sorry thats not much help though
