I purchased a Raspberry Pi – Model B – 512Mb version to have a tinker with. As I noticed this model came out at some point.
I previously had some 256mb models and they ran pretty well however had a few limitations with them which affected what I needed to use them for. It appears so far the newer 512Mb model hasn’t had those issues so far. The problem I had was during reboot from command line the unit would hang during post and/or hang randomly.
I am going to check out OpenELEC again and see how much it has improved, in addition I have ordered a DVB usb tuner  that is being used for SDR. As I want to run some of that off the Raspberry Pi (RPi) to see how well it performs. Will post more about this soon, once all my hardware arrives.