I might consider 3 BTC's worth.
What is the expected hashrate for 3 BTC's?
Currently I have on order:
10 Shares via KnC group buy worth 28 GH/s I paid 5 BTC's
7 Shares via KnC group buy worth 9.87 Gh/s I paid 2.1 BTC's
3 K16's via TerraHash worth 13.5 Gh/s for $750 or ~7 BTC's
We are expecting +/- $40 per GH/s so at current price it will be 2.70GH/s per 1
BTC5
BTC worth 13.5 GH/s with shipping, assembly and hosting administration, cooling and support for the hardware so you don't have to worry about anything. One single order to do everything for a low fee and you're not forced to purchase the whole miner if you don't have the money right now.