Anyone every purchase / use hardware from <http://SiliconMechanics.com>?

Their prices seem to be unbeatable.

So I'm curious to know how reliable their servers are.

**Also, who do you recommend to buy the best bang for your buck on rack servers?**
['https://serverfault.com/questions/31361', 'https://serverfault.com', 'https://serverfault.com/users/-1/']
For the love of the flying spaghetti monster; don't ever pay retail.

We just did a large purchase from Dell for a bunch of servers, an EMC CX4 SAN, switches, load ballancers, etc. With full Microsoft licensing we paid easily 30-40% off the original quotes. It's all about having a good sales rep, and being able to negotiate when them and get them to work the partners for the best possible deals.
I have a Silicon Mechanics rack mount that I bought used. It is a dual socket Opteron system with a 3ware raid controller and I have had no hardware problems with it. A friend bought some used on Ebay and those have worked without hardware issues. My former employer has a dozen Silicon Mechanics boxes that they use for Test and Production. The only problems those boxes every had were software issues with our own code.

If I were looking for new servers, I would put them high on the list of vendors to get quotes from.