I wish i could replace all my sp20 at home with some AV6. They are really good miner !
This is pretty much where I'm at. I have four SP20 that I was going to winter mine with to squeeze out the last profits, sell, and replace the gear. Due to my power setup and supplies, the Avalon6 is a better match for replacing my SP20s than the S7, so I began the gradual phase in process with the last Avalon6 group buy. Now that I have one, I'm impressed. One plan was for 3 Avalon6 to replace my four SP20s for a rough doubling in hash rate while reducing operating expenses 25%. The diff spike has disrupted my plan though-- another 20% after this 20% and the SP20s MUST shut down early because even winter mining isn't going to work for them any longer. The value I can reclaim from them on the used market is greatly reducing as well. I don't have all of the replacement gear lined up and even what I can replace them with is dropping in value way too quickly.
At the moment, assuming the price of Bitcoin doesn't drop before decision time, I'm still in for one unit in this buy. ROI looks near impossible, but I can probably still get something (albeit little) for my SP20s to help with this buy and I really don't want to drop below 6TH. If the buy doesn't happen it isn't a big loss to me though either.
EDIT: Not sure what is going on but pushing the diff that much is just killing everyone profit. It looks like some big gamer are fighting for a bigger piece of the cake. Like a huge rush before the halving.
I can only hope that same "big gamer fighting for a piece of the cake" also has a game plan for driving an increase in the BTC price for that cake. Otherwise, we're all going to be done in a few months. That risky possibility is what is keeping me from exiting entirely right now. Of course, I can play that game by just buying coins instead of buying expensive mining doorstops... and the coins I just bought for this group buy might go that direction if the buy doesn't happen.