Pals Which WIFI Router of the 3 ???

pals, m confused amongst the 3 routers..which 1 to buy?

1. TP-Link TL-WR1043ND
2. ASUS RT-N16
3. ASUS RT-N56U

REQUIREMENTS:-
1. Download Torrents.
2. USB with sharing support (media streaming)
3. Good range

thanx

angel