USB and 3.5mm input RCA output soundcard for less than 100?

[Scott_Tarlow]

I'm looking for a solution a a problem. I want a USB soundcard that i can connect my audioengine A2s to, but I also want to occasionally input my iphone to them as well.There is a 3.5mm input on the speakers but I like to leave the speakers powered on all the time so leaving a 3.5mm cord hanging out causes noises. Anyone have a solution to this? 

 

[StoneJack]

Creative Omni 5.1 has RCA output, line output 3.5 mm, headphones 600 Ohm output.