Hey. I'm buying a pair of monitors (KRK RP6 probably) and I'm also looking for an interface so I will get the most out of them. However, I don't know the first thing about audio interfaces or I/Os etc. so I have a few questions: 1. What should I look for in an interface? Which inputs/outputs do I need? I make music alone and I don't need to record any instruments, I'm just looking to connect a pair of monitors to the interface. Also, I might buy a MIDI keyboard in the future or perhaps a DAW controller or a mixer, but I take it that these are connected directly to my PC with USB (?). 2. Should I connect my monitors to the interface with XLR or? Are all of the needed wires usually included with the products? 3. Will a USB audio interface suffice or should I buy a PCI(-e/-x) or a firewire interface? It would be nice if the interface was portable, It doesn't need to be though. If you have any suggestions, my budget is around 175-200€. Thanks. Edit: Linking headphones to them would be nice too.