Hi, Speakers are the first priority in the home theater system where more money should be allocated to it because they are the only future proof which can last long for 10 to 15 years.. Having said this, I would suggest to choose the speakers depending on the power and quality of the receiver / stereo amp you own now. Few things to consider here,
we need to look at the sensitivity in the floor standers, something like 89db or 91db.. the more the number indicates how much louder they can get and at the same time leaves the AVR to drive them with less power.
Secondly, (ohms) impedence choose between 8 and 6.. which are standards now for most of the floor standers in market today.. 4 ohms speakers requires more power and stress the AVR than the 6 or 8 ohms speakers. This is because 4 ohms speakers can get much louder than 6 and 8 ohms.
Third comes the frequency part - As floor standers have larger enclosures they tend to produce low and mid frequencies and hence anything below 42hz can definitely sound good. Usually the crossover inside the cabinet will split the single signal from AVR to high, low and mid frequencies where the highs will be directed to the tweeter and lows will be directed to the woofers and the mids will be directed to mid range cones. This is called 3 way system. The mid range cone dont move quite fast as the woofer because of the frequency split.
Coming to the suggestions... When buying speakers always choose European or American because they know whats best!
Taga TAV or platinum series are budget speaker system which can be paired with entry to mid receiver series - can save money as well but audition them first (616F, 806F, 606F) I am trying to get some reviews for 806F for myself...
Wharfedale 230 or 240 - little expensive ones 40 to 60k - excellent quality
Other brands like Klipch, KEF or Polk will cost a lot more
You may also see Energy CF 50 or 70 but I dont know if this is sold individually anywhere in India. In my opinion, I wouldn't spend 1,00,000 on just the floor standers and it is my personal opinion. Just do the analysis, the sq feet of living room and power of your amp and do the selection.
1Lakh is a lot of money to complete a great 7.2 set up. Ultimately, it is your call