Why? Well, I wanted more ISRs in my home lab.
That, plus my ISP (Virgin Media), will be upgrading my line from 120mbit to 152mbit in the second half of 2014. Looking at the Cisco docs, the 2851 ISR I am using can only do up to around 112mbit/s.
Although there is a long time for my ISP to go forward with this upgrade, I saw the 3845 going reasonably cheap on eBay, cheaper than what I expect it will be next year when my ISP WILL have upgraded my line. So, I decided to just buy it now. 🙂
I am really starting to have a problem with space for my home lab. My rack is already pretty much fully populated, so I now have equipment on top of, and surrounding my rack. I don’t really have space for a second rack at the moment, so it looks like I can’t expand my lab any more for a while. Oh well. 🙁