Go ahead with hob as long as it is good quality won't trouble you at all.
Faber is oldest and market leader. We have faber 4 burner steel hob in our kitchen for 15+ years perfectly working fine. The area around burners is completely sealed and spilled milk or any other material remains on the top which just needs to be wiped off like any other place on platform.
The only maintenance you will ever need in 5-6 years is auto-lighting element /stone replacement that costs around 300rs that too for your most used burner. This is actually not a show stopper as you can use a gas lighter or matchstick.
Hob in pur kitchen was opened just once last year that too on insitance on service guy and after opening we found there was no need. Faber service guy comes home just like aquaguard service.
And yes 4 burners are better than 3 as you have more choice of burner size as per need.
Also baffle filter in chimney is best for Indian cooking you just need to dip them in hot water + pril diswasher liquid once a month and clean with brush like any utencil.
If you have dishwasher it is even easier.
Avoid mesh filter in chimney as oil vapors accumulate in mesh and fall back on condensation. To solve this chimnies now come with oil collector etc but they are not needed if there is a baffle filter.
One thing about chimney don't go for very high suction motor as bigger the motor higher will be the noise and you will tend to not switch it on while cooking.
For homes 750 to 1000 cubic meter per.hour is sufficient.
Hindware and prestege chimneys and hobs are also good. I have put a prestige hob and chimney in my another rental flat and working fine for 5-6 years.
Stay away from Chinese brands often being sold at premium prices under European sounding brand names like Elicia, Gilma, Kaff etc. too many problems.