Hi Thomas,
I cannot speak for the Yamaha speakers you have mentioned but the wharfedales are a respected speaker company manufacturing only speakers. Yamaha are more famous for their receivers.
I have heard the Elacs, I think Debut 5 & 6 & they were wonderful for music & I would prefer them than the above choices. The Wharfedale I mentioned would be suitable for your smaller room. Having said that, you will definitely require a subwoofer in future for movies since the small bookshelf speakers will not give you room shaking bass.
For auditioning the brands you may need to ask the FM's from Kerala who are more familiar with the dealers.
Regarding Chinese speakers, yes Wharfedale is owned by a Chinese company but so are Quads, Castle knight etc. Most of the famous brands like NAD, Marantz, Denon, Arcam use to manufacture most of their models in China earlier & now Vietnam. So are the big brand mobile phones like apple & Oneplus. That truth is inescapable.
Only the premium top of the line models products are manufactured in Japan which would be way too expensive.
For Budget speakers & Subwoofers, pls also consider Taga & Bic America which offer value for money.
There are also budget floor standers for the fronts for your big room from Tannoy here
Tannoy Floorstanding Speakers @ ₹21,170/pair Tannoy ECLIPSE 2 Features: 2-way floor-standing loudspeaker for medium to large-sized rooms 5" mid/bass driver offers a powerful performance 1.1” coated silk dome extends high frequency response to 25 kHz providing fine vocal and instrumental...
www.hifivision.com