Switched to VOIP?

Ok, it's been too long... After yet another "phone call of despair" to my current telephone provider today, I've decided I really need to switch to VOIP for my home phone. My requirements are fairly simple: I have three phones in the house which need to be connected, I make few local calls and about 60 minutes of international calls each month, and I use Caller ID (sent through to my Media Center TV) to see who's calling.

For switching to VOIP it looks like I have two choices for my area: Vonage or SunRocket. 

Vongage appear to be a more established company and offer a service that's cheaper in price to my current line - but not the cheapest in the VOIP space. They do seem to have some cool features such as the softphone and talk of wireless phones in 2005.

SunRocket seem to have a better package, offer a second number free of charge and have 100 minutes of international calling per month free. This is the first I've heard of the company though and I'd like to be assured that they will still be around in an year if I do sign up for their annual plan!

Anyone have experience with either of these? Any more I should be looking at? Any tips or advice?