red fury will do 2.5 an anminer will do 2.0 (not 2.2) ant miner is .044 btc so 25/20 x .044 = .055 btc x 590 usd = 32.45 a stick
basing my ant miner price from here.
https://bitcointalk.org/index.php?topic=382494.0red fury sticks are nice but cost to much
ice fury sticks are nice nut cost too much.
get antminers
BTW even antminers will not make roi in terms of btc. unless you can run them for free at the office/dorm/school