Unless you are a sucker for headaches, avoid importing.
Technical aspects to consider are voltage (110-220), AC/DC, 50Hz-60Hz, refresh rate supported and required, parts, warranty and support.
There were a bunch of small companies importing TV and A/V equipment on their own that might have what you want but then again you are on your own if things turn sour.
Regarding picture quality, it the refresh rate that makes the difference. Regular quality here is 60Hz. The ones that look great are above 100~120Hz. Most people can't tell the difference once you get past 120Hz.
Best way to tell is looking at an action packed movie where the image does not fragment. The TV CPU must be up to par with the task, not the rule with cheap UHD/4-8k TVs.
Find you model and look at internet reviews before purchase. Here or abroad.
Iz