Server Rack upgrade plans

These are my plans for future expansion of my server rack, the first being my current setup (Sept, 13, 2011), the first step should happen within a month.

 

The arrows point the way, ate step 3 I don't know what direction I'm going to take (more space or additional server to replace the aging DL380) so it's a choose your own adventure.

 

In the last stage the servers are as follows (top to bottom):

Dell R310

Dell R310

Dell R510

Dell MD1200

HP DL380 G3 (have)

Supermicro custom (have)

Done