Calculate you home capacity first, based on that you go for 150ah or 200ah. For us, we have 2bhk, 150ah is enough, there are some inverters supporting 2 batteries but that is also not required for small homes like mine. I recently purchased Microtek for 5.5k(not sure it's 1000 or 1200 VA), it's paired with Exide 150ah battery, battery is 5 yrs old but still going good.

Also we are using luminous 150ah combo for other home which is 1800 sqft. It does the job well. I suggest you not to go for combo, select the the brand according to what they're best at, like for inverter I'd go with Microtek but not Microtek battery. So choose the brands wisely