[tdfx]

I've used SliceHost, Linode, and AWS, as well as some "no-name" providers. Linode is my top pick. I've thought about moving my stuff to AWS (due to the hourly vs monthly billing) multiple times but always ended up staying with Linode.

[remthename]

I should have added this as part of my original question but how easy is it to upgrade your hosting solution. Say I have a 20$ a month one but then one of my websites takes off and I need bigger and better. Is the transition painless?

[oomkiller]

Linode customer here. It really depends on your architecture, but I'd say it's just as easy to scale at Linode as it is with AWS. You can simply upgrade your linode, but that involves some downtime (depending on how much disk space you used). The other alternative is to setup a separate one then once you have everything switched over shutdown the old one.