I got a Pi B in the first batch of pre-orders and then a 2 and a couple 3s. My original is being preserved as a museum piece in a sealed sarcophagus. The 2 runs as a pi-hole, one of 3s records all the critters in the back patio and the new four is perusing the net, plexing, watching OTA, monitoring the pi-hole and remoting into any other pc in the house, all at the same time. Bloody incredible. I spent about 100 bucks for the 4GB plus accessories and thought that was a bit much for a Rpi, but after further eval., I think it was worth it. I got the Micro Connectors fan/sink and the Pi Case but it overheats with the fan running if the case cover is on fairly quickly when you have a bunch of stuff going. The stress test sends it way up real quick if the cover is on. Take the cover off and as long as the fan is running the stress doesn't send the cpu temp over 68. So I recommend either getting a case with really good ventilation or drilling some holes if they aren't there already.