Hello guys, I am from India and I own a website designing firm in Guwahati, Assam (North Eastern Part of India). I am currently using Hostgator servers to host my clients' websites. DO you have any further recommendations of any other webhosts that I can use for hosting my clients' websites. The servers should work well for the websites of North Eastern Part of India. Please include some web hosts that I can use in my future time.
The OP and his clients are based in India, I think his first preference would be getting hosting on a Indian based server rather than from any other country.
Try to gather as many reviews about its web hosting services (both positive and negative) and serve these as basis in choosing web host providers.
I think you can try Hostocol reseller hosting, they are good in terms of website speed.. http://www.hostocol.in/reseller-hosting/linux-reseller/