Compute power versus storage on the Raspberry Pi

My three additional Raspberry Pis are here and one thing is immediately obvious – compute power is now much cheaper than disk storage. The three devices together give me about 2100 MIPS (based on the BogoMIPS calibration on my existing system) and cost around £90 for the lot.

I am not sure what the storage is going to cost me, but with three SD cards and three USB disks I will be lucky to get the lot for £150.