Here are a few that I'd recommend. I tend to prefer a more traditional style of espresso.
- Proud Mary: Humbler. Works great black or with milk and easy to dial in. Haven't tried any of their others yet.
- ONA: Raspberry Candy, but most of their milk-based coffees are a pretty good bet. On the more expensive side.
- Lime Blue Coffee: Their blend is good. Also a cheap way to try out some single origins. On the more affordable side in general and they'll often have sales on ozbargain.
Haven't had a chance to try them yet, but was on my radar. Any in particular you'd recommend?