Don't go with one that you found that has cheap prices.  Sadly cloud mining if full of scams.  A lot of sites do not even have gear behind them, they fake mining.. give you part of what you paid.. and in the end you lose money.

I really like owning gear personally.  You might look at owning the gear and hosting it somewhere.  There are lot's of options out there for this.  But if you do decide to go cloud mine as Phil suggested deffinaly go with hashnest.