As you move up the price range, you expect more from an interface. Stepping up a level from the basic beginner models, you start to see options which make interfaces much more versatile as well as expecting sound quality to improve.
Despite being around for a few years now, Native Instruments’ Komplete Audio 6 offers an impressively complete set of features for the money. You get four analogue inputs (two with preamps) and four outputs, plus two channels of digital I/O thanks to a coaxial connector round the back. Add the fact that it also has MIDI in and out plus basic monitor control in the form of that big top-mounted volume knob, and the Komplete Audio is great value for money.
It’s compact, superbly well built and runs entirely on USB bus power, making it a great portable option. Traktor compatibility also means it does nice double duty as a digital DJ setup. The icing on the cake is the inclusion of an impressive suite of software as part of the package. The bundle includes Cubase LE, the Komplete Elements suite of instruments and effects, plus Traktor LE for digital DJing.