Colo networking suggestions?

Hi all,

So I've got a bit of a project lined up, basically building out a colo facility using Cisco networking equipment and HP servers. We plan on hosting everything on a VMWare environment and our web servers physical (due to licensing costs of our CMS software).

Really the main issue that I am having is selecting proper networking equipment for what I'd like to do. I'd like to have a 10Gig backbone, with 10 gigs between ESXi hosts and our SAN (can be either base T or SFP+, but needs to be copper) and 10 gbps between our ToR switches to our aggregate switches at EoR (this I am expecting to be fiber). As we're using HP servers, I'd like to also be able to use the same switches for ILO (max of 1 Gig NICs) without getting additional switches. We also have some gear which only uses 100mbps (PDUs) that I'll have to find some way to connect, preferred not to run cables between racks and have all of the server/power infrastructure connecting within the same rack.

Has anyone had any experience doing this before? My sales advisor and his technical guy are dead set on a huge central switch (think 4510) and running all of our cables into that rack, which I am opposed to.

If anyone has any suggestions, I'd appreciate it!