You can run with a underclock if you want quiet. But I would personally never order from BFL.
SP20s you'll need to get 2nd hand from other forum users, you'll find listings here: https://bitcointalk.org/index.php?board=75.0
Avalon4s you can get from ehash.com
S5s from bitmaintech.com
how are those avalon 4s miners?
Finally got to start testing one of the Avalon 4's out. They are VERY quiet. It if first miner I have put in my bedroom for fun as I test it.
No other miner I have comes close to it on it's low noise output.
Ya but what is the BTC output vs. what you paid?
Let us be real.
I went from cash to btc then buying. I enjoy playing with all miners. It's a hobby I try to make it profitable but there are no guarantees in mining. I enjoy testing them and sharing my results. No matter what it won't be as bad as my A2 was. That was hardest miner I ever had on making ROI. Either way I make sure I have fun along the way.