been looking at websites like colomachine and www.rackmountmicro.com

can anyone recommend any other sites? im looking to buy like (3) quadcore 1u's

http://www.siliconmechanics.com/ is a good place too

Ever consider building one yourself? Of course, you don't get "support" other than from the component manufacturers, but that may be sufficient depending on the scenario.

We've had good luck with the Supermicro and Tyan hardware from newegg.com, then again we have our own staff to support it so that may or may not work for you.

Like another member suggested, building one might be an option. However depending on your requirements, name brand servers such as HP have some pretty affordable options.

Branded server are too costly for a particular config and also tedious in many cases for the support, upgrade all

Did you try google to find some companies? Also, using the request area might bring more companies forward. But, building one might be your best option, but support is something I think you would want as well.

You can try ezzi.net if you are looking to colo in the east coast area

TRy newegg.com to purchase some piece of hardware and assemble it, for colo i suggest you cologuys or sectorlink both are good, u can try burstnet also now their network is good

Another thing to look at would be Dell's machines, some people love them.
If you want good support then either Dell or SuperMicro is the way to go

Have you tried searching on ebay? You may get it pretty cheap there.