I really wouldn't touch any ASICs anymore. We have had just too many "scams" by Bitmain and other ASIC manufacturers, you buy an ASIC from them and you basically never ROI when getting a batch 2+
Yeah, BM have been too clever for their own good.
Unless you get batch 1. You'll only just ROI on batch 2, then be left with a doorstopper. In some cases (see the XMR saga) you don't even get that. When you factor in the hassle and time spent playing fastest finger, shipping + fees, customs faff, warranty returns to China and then maintaining a dedicated noise-proof, power and cooling area for your asics, it's really not worth it at all.