What to buy?

Hi: I'm looking for a good pair of floor standing speakers but I don't know anything and I'm hoping for suggestions here.  I've been considering Martin Logan Electromotion, Goldenear Triton 3+ and Revel F35. I can raise about $2,000 in a month. The room is 20 x 20, the music is mostly rock. The amp is an Emotiva XPR5 which has respectable power. I don't mind something good that's maybe been superseded, trailing edge, a floor model or demo - but something you can't argue with at the price.

Thanks - rev