Hi - it really depends on what you like. Sounds like a blank slate to me so any of them would work. If going with a solid rug, consider adding some contemporary pattern in pillows, (Ikat, chevron, stripe etc.). If going with a patterned rug, keep the pattern contemporary like those I suggested for the pillows. Guess it depends on where you want to see color & pattern. If ultra contemporary, you could go with more monochromatic cloices but be sure to add texture -like a shag rug, leather pillows, etc.