Most of the more recent ones haven't had a chance to prove themselves except gawminers/zen since they originally started as a hardware resale merchant.

Anyone can say site x is best because you'll roi in 30-40 days but unfortunately said company will most likely be a hit n run ponzi scheme.

My opinion? gaw/zen at least this way your buying from a company with proven credentials, based in usa (which makes being a ponzi even less likely),and most importantly if a month down the road you don't want to mine anymore sell your MH's on the market for 80-90% the original price.