Ask HN: Best Startup Phone Option

I run a startup where a large amount of our sales and business are conducted over the phone. We've been considering getting a phone service so that we can have a phone number for our business and so that we can place that number on our website for potential clients to call.

We're a team with a virtual office so landline options probably won't work.

Does anyone have a service they really like (VoIP or otherwise)? Should my company not even bother?