Without an exact amount it's still difficult to recommend a miner. A6 and S7 could work well for you, not too expensive and doesn't break as much as S9s.
I have no idea about the exact amounts.But I would prefer the one that makes less noise,lasts longer and obviously consumes less electricity.If you have any leads,that would work too.Thank you.
Most efficient in stock form on the market now are the Antminer S9 and Avalon A721. Both are loud, but the S9 is louder than the A721. Both require more than 1000 Watts to power.
Antminer S7s are still popular, but less efficient, and still pretty loud. If you can find an Antminer S7LN, they can be quieter, but the quietest S7LN is one that has been hacked to alter the power fed to the ASIC chains. By reducing the power you do reduce the total hash rate, but it still generates ~2 TH/s and only draws ~450 Watts. This lower power draw allows you to turn the fan speed down to 20% or so and still let the chips run hot enough (~50C) to hash properly (they do not like being "cold").
I have a sidehack modded S7LN that is drawing ~450 watts at the wall, producing ~2 TH/s, and with fans set to 20% is quiet enough to have in the office beside my desk. I can also watch TV without having the volume cranked up. See the link in my sig for the recent S7LN stats.