Hard to make out the crema on this - and I've got more consistent at getting better shot from the machine now. Excuse the crap light and my whispering..
Before you go out and get a grinder - what are you using at the moment for beans and grinder? Additionally - there's also the tamp. What are you using to tamp the coffee too?
Question is can you make the grind fine enough to choke the machine?
edit: Some espresso blends are made specifically for it's nice looking crema. Others such as single origin may look less red but will still give a decent crema.