Perhaps, this review can help.
http://www.which.co.uk/reviews/televisions/article/advice/best-tv-brandsPersonally, Samsung, Sony, and LG are the Triad of tv brands worldwide. If your criteria are picture quality, durability, and design intelligence, these 3 brands are often unrivalled.
Toshiba and Sharp are "has-beens" but recently, their attempts at improving their product offerings (with Toshiba's CEVO Engine and Sharp's Quattron Pro picture processor) have once again placed them in contention but to my mind, still by a long shot compared to the Triad brands.
The Chinese-made tellys (e.g., HiSense, TCL, etc.) are still doubtful but one must realize that most circuitry and innards of some of the stellar brands have a "Chinese" DNA so to speak ergo, we may be discounting them too much. I am reminded that in the past, Korea also suffered from "brand recognition" until they amped up their R&D which effectively polevaulted Samsung over Sony as the world's #1 selling A/V brand.
One brand though that I've been reading about for quite some time (for its supposedly quality performance) but can't seem to find here in RP is Vizio. If you should ever see one, have it tested side by side with a top brand and let us know.
All in all, I believe the criteria you should look for in your planned tv purchase are:
1) picture quality - the most important consideration (I believe)
2) future-proof features - since new A/V technologies are being developed even as we speak; which will render current technologies obsolete and therefore a poor investment decision especially when you're the type who always upgrades
3) price - remember that in some instances, price is not necessarily a signal of product value. I remember buying a pricey 32" Philips flatscreen tv before for 40K (home theatre included) but it wasn't even an FHD and worse, the processor conked out in less than 3 months
4) resale value - related to #2, Triad brands often fetch the highest resale value thus, serving you in good stead should you decide to upgrade
5) ease of firmware upgrade - new programs are being designed to upgrade your telly's capabilities but not many of these can be easily connected to the internet. Ask your tech/sales rep for details
6) durability - a Triad brand claims to have a panel life span of 100,000 hours. Let's say you watch 8 hours of tv daily (that's 2,920 hrs./year) and dividing 100,000 hours by this figure, you'll easily use your telly for a whopping 34 years! The actual life span may be lower than this figure (when you consider voltage fluctuations, frequent switching on/off, power surges, etc.) so let's just peg it at a conservative 15 years - which is still a century when it comes to telly life span, hahaha! Your toy may even look like a Smithsonian museum piece by that time when compared with new upgrades!
At any rate, be wise. Don't jump on the bandwagon just because everyone else is itching to get their hands on a new flat screen telly. Save up on a "future-proofed" model so you don't have to get frustrated when something new comes in the horizon.