... I will use your post as guideline, I don't want to jump to conclusions but seems, apart from Ebang, that my choices are between Innosilicon T3-39/43 and Bitmain S15.
Thanks again for your time guys!
Do not forget about the Whatsminers made by microBT. One excellent distributor of them is Pangolinminer.com. Very efficient and so far very few reports of problems with the M10-31 and 33T versions. Those who had issues were promptly taken care of by Pango. Their newest are the M20's running 48T, 58T and 72T but unfortunately a fairly long lead time for them.
To tell the truth, given the reported reliability and support history of the previous Ebang miners I would not touch them with a 10-foot pole...