4. Unfortunately, just about every LCD/LED 3DTV out there lags more than what you would require. The Sony EX720 is one rare 3DTV that lags at 16ms, but that was last year's model and it isn't available anymore as far as I know. Plus, the quality of 3D on this TV is less than stellar. As in, there's plenty of visible crosstalk, which isn't an issue on the 2012 models.That PS 3DTV is pretty decent for 3D content, but for gaming it isn't recommended due to a high amount of input lag (over 40ms). Plus, for optimum viewing of 3D content, I would suggest that you at least go for a 40" TV. The larger the TV, the more visible and immersive the stereoscropic 3D effect.
On the other hand, there are Plasma 3DTVs that lag as low as 16ms, such as the Panasonic ST50 or the Samsung E6500. However, neither of them are available in the 32" range, and hence would exceed your current budget. Still, it's something to keep in mind whenever you do decide to get a 3DTV.