One of the joys/pains of owning a colocation company is the constant upgrading. It is very hard to get ahead, it seems like I'm always buying a new server, firewall, switch or something. I would love 6 months on not having to buy an expensive piece of hardware, YEAH right!
On my list of upgrades for the next few months- another spam applicane, firewalls, layer3 switches, exchange infrastructure, ssl vpn gateway(waiting for the price to come down a bit and to find one with all the feature I want either way it's going to cost me)
I'm also moving into a new office next month, that will be some more shopping I'm sure.