I need to write a proposal for, and hopefully implement, a colocation based network within the next few weeks. I know what I want, network and software wise, but I'm a bit up in the air as hardware goes. We'll be running linux and I strongly prefer a 32 bit x86 infrastructure for that, but otherwise I have no strong requirements.
I'm looking for general suggestions along the lines of what are good brands and/or vendors, and if there are obvious things I should look out for. If there are multiple good suggestions, points will be boosted and split.