My personal experience
In SD : d2h>TS>dishtv>Airtel
In HD: Airtel>TS>d2h>dishtv
Not sure about sundirect.
So overall tatasky provides best SD and HD.
When I moved from tatasky to dishtv last year I had to increase contrast and brightness by almost 30 points still picture was bit dark(in computer terminology gamma bit low which you cannot adjust in TV).also in TS sound quality was theatre experience if audio is set DD plus whereas in dishtv it's normal stereo..no theatre feel
How tatasky is expensive bro? New HD connection price is ₹1499 only. Is this you called costly? Which dth gives you new HD connection in this price? After trai rule channels and package prices are fix now and in this new rule tatasky has all major HD and Sd channels means all packs channels other then rest of dths. Bro don’t misguide anyone if you have biased against tatasky. We know you are viewing IPTV but don’t misguide anyone.