Great thread and some very valuable points being discussed here as in all Phil's threads!
Personally, I am still 100% GPU... 24 470's mining ETH & 12 1070ti's mining ZEC. Due to a heavy workload recently, I haven't been able to sufficiently research all of the goings on with new ASICs and FPGAs but clearly, these have already had big impact and that will only get more impactful over the next few months.
I have historically avoided ASICs, mainly because of not being able to get it early enough (to get a first batch at retail for instance) and the fear of ending up with a paperweight at the end with possibly not even ROIing. With that said, I did have a good experience with an FPGA (Baikal mini). Paid $300 and was able to mine about 5 DASH with it. ROI'd x3 with sold DASH and still hold 3.5 coins. Plus, even after it couldn't mine DASH profitably any more, I was able to switch to some of its other algos and while not hugely profitable, it made me maybe a few hundred extra. So, overall, a very good experience, but $300 is a pittance compared to some of the units coming out now.
Still, i know Phil and others on this thread have done quite well with recent ASICs, and I have been trying to research to see if I can pull off something. What I've been looking hard at are the Decred miners. Personally, DCR seems to be a very solid coin, with its prices not plummeting as low as other coins during the crash in Jan/Feb and it is currently closer to it's all time high than pretty much any other top 100 coin. Unfortunately, those DCR miners look to be the most expensive on the market, but at least at current rates, the ROI period is quite small at maybe 9 weeks. Of course, the big risk is that once all those 2.1TH miners are shipped, rewards will go down, but the question is of course, by how much. Also, there seems to be a few versions/brands of essentially the same miner, so not sure what that is all about, but the Innosillicon version looks to be available for about $6500 and shipping within 2 weeks.
Do any of you have experience with this company?
http://www.innosilicon.com/html/d9-miner/Also, i think someone on the thread #7 posted a link to an ASIC/FPGA profitability list but now i can't find it. If someone could re-post here I would appreciate it.