I ordered a grinder and an HX with an E61 group yesterday. I haven't been advised of shipment or tracking numbers yet, but my hope is that I'll be able to pull my first espresso from my new machine in about a week. This will be my first quality espresso machine and grinder. With that in mind, I want to order some coffee so I can be ready for the big day. I have no (none, zero) experience with good commercially available blends, so I'd appreciate hearing about some of your favorites for an E61 HX.
I'm ignorant and completely open to suggestion on coffees to try. Here are some that I have decided to try based on the descriptions I found in the thread
Favorite Espresso Blends 2010: Black Cat Classic, Espresso Toscano, and Hairbender. I'm going to start with those three simply because their descriptions appeal to me.
Having no experience, I know I could select almost anything at random and stand a good chance of being pleased, because being ignorant, I wouldn't know any better.

But I'd like to know what commercially available coffees you like from your E61 HX and why that coffee appeals to you. I want to add them to my list!