Bit 49, and miners.eu both seem like scams, or fairly new businesses, I wouldn't trust either with my money, especially if are buying fairly expensive mining equipment.

I believe Omega was referring to this thread - https://bitcointalk.org/index.php?topic=5145072.0. Look at the first post, looks like they have a fake team and looks like a confirmed example. The only positive comment is likely by an employee of them.

Teslawatt looks legit, not 100 percent sure though...