IPS panel's advantage is not only Color and Viewing angle but natively IPS is the brightest of all LCD panel types. Even samsung has switched to IPS for many of their devices from SPVA(except for their televisions) and they call it SuperPLS and SLCD2.
here are a few other advantages.
IPS panels can process high speed signals without data loss by using copper wiring with low resistance values.
IPS Panels offer clear images and stable response time.
IPS panels display consistent and accurate color from all viewing angles
IPS panel - Wikipedia, the free encyclopedia
LCD types: TN vs. VA vs. IPS - Feature - TVs - CNET Asia
As far as many people thinking Sony has better picture than other televisions involves many factors, Sony has traditionally had a big name of television in Asia and USA, Asians and Americans have mostly preferred Sony's way of producing picture since the CRT days.
Because of this name Sony created and the fact their televisions are priced higher than most other brands the customer tends to think it is because they offer a better product but that should not stop anyone form deeply analyzing the television forgetting what brand or what price before making a final decision.
It is just like how most Indian consumers who live in major cities tend to think Bose is the final word in high end audio, but in reality Bose is not even remotely close to being high end in terms of the quality audio it produces, there are products which costs 20% of what Bose does can sound many times better.
The last time i was seriously considering to buy an LCD was like few years ago(2009) when i saw a Philips 9803 in Singapore which was kept near a high end Sharp and Sony LCD(all the three television were very expensive), me and my friend were in that store for like 2 hours watching different content and playing with the settings, that 9803 was way head of both the Sharp and Sony LCD(specially the way it displayed so much more details), it sure had halo's because it was a local dimming LCD.But i dropped the plan in the next 1 hour as soon i saw a pioneer kuro playing in the next section
Philips 42PFL9803H review - FlatpanelsHD
So the objective always has to be to buy a good product which suits your needs.When one goes to buy he should forget the brand name and only look at the product, it could be from Akai or from some unknown Chinese company but if they offer great product, which is also fairly reliable, which you feel suits your personal taste then people should buy without any hesitation.