I have my own designing company since 2007. Since then I am using re-seller hosting of Leapswitch networks. I have hosted around 1000+ websites with them and I should tell you that none of my client has still reported any issue regarding the site being down.
If anyone of you are just starting out with web design business or any other software company I would recommend them to go with Leapswitch as they have their data center in Pune, India itself. They offer affordable prices on hosting which is required for any start up or any other company to lower the operating expenses.
I would recommend you to visit their website https://leapswitch.com so you will get an idea abt the prices too.