I only own one mechanical keyboard, a Leopold TKL Brown, so it's the only one I talk about in terms of actually owning one. So far it has been amazing, and from what I have read on this forum they are very reliable. So I feel if you choose to buy a Leopold you would not be disappointed.
With that being said I would agree with the people suggesting the Rosewill. It is very well priced and has said to be just as well made as the Leopolds and Filcos. The only draw back with this keyboard though is that it isn't available in a tenkeyless format. When I was choosing a keyboard this was very important to me, which eliminated the Rosewill for me. The Rosewill also has a gross logo right smack on top which is a huge turn off for some.
But if you are cool with having a full sized layout, then what's wrong with a keyboard from WASD? I've heard the quality is top notch, and you get to customize it however you want.