I would like to be able to hook up my Macbook Pro (USB), Traktor S2, Audio Technica turntable and an iPhone/iPad (3.5mm to 1/4" cable) to an interface that will be broadcasting through my pair of Rokit 6s.

I was originally going to go with the Focuslite Scarlett 18i8, however, it only has four line inputs and I think I will need a total of 6 since the turntable, S2 and iPad will all be stereo sound.

I'm looking to stay around $300. Thanks in advance.