alright,maybe this thread appers too early

sorry, i haven't been to usa yet,now,i still stay in china ,i just decide to apply mit sloan ,it 'may' next year...

i plane to buy a rs1i,but i heard ps500 comes recently,it'cheaper,so it makes me hesitated,becaus of i'm in china,these's no chance for me to campare them.so i wish is there anyone who has first-hand experiance could tell me the difference,especially the performance without amp.thx alottttttt!!!