I say why not especially if you can pay cash. Your keeping your btc for the future I assume and as long as you have xtra cash I say go for it and stockpile the btc - should you buy from the factory with btc for sept 20th no.
That what i plan to do. I am going to keep all the bitcoin. Is not worth it cause bitcoin value will increase
Yes, i bought all my antminer from the supplier in my place
is cheaper than online store in my place.
I hate waiting for the antminer s3 batch 8, is not a huge upgrade increase and my current antminer s3 now even without overclocking it was already at 450 GH/s to 460 GH/s plus i will buy it by tomorrow and start mining in 24 August to 20th September, it will be 28 days of mining before i can the hands on the batch 8 by the time difficulty will increase. So is no worth it in my opinion.