like previous post, do your research , make your own decisions - in a lot of ways ASIC are a gamble - are you a gambling man?
i.e.: Block reward halves, difficulty skyrockets price of BTC does??? despite all the expert opinion
no-one on this planet has been involved in a blockchain based cryptocurrency whose reward halves approximately every 4 years - it is
all speculation and best guess on what will actually happen in the Bitcoin mining scene over the next 6 months

I bolded the relevant parts from my last post as to why anything to do with Bitcoin mining is a gamble, ASIC is a subset or an extra gamble on top, depending who you talk to.
well the ultimate test will be what happens to the BTC price.... normally a smaller supply @25 Btc's would dictate the price to go higher but markets tend to anticipate this so may be that's already build it. May be once the ASIC machines come online and only the 10% of gamblers have any BTC to sell everyone that isn't getting any decent returns anymore will have to buy them. And what happens when all coins are mined. ...... all mining rigs become instantly worthless. So with 500 BTC left to mine will we switch back to GPU's that are running anyway because who would want to spent $$$ to buy something that will get those last 5G's ?