Raspberry Pi 3 B+, with the B+ meaning an extra 200MHz, 8.0.11AC, BLE4.2 and PoE input.
Raspberry Pi 3 is a great piece of hardware, and the new B+ upgrade keeps it even more relevant.
There's a few IC upgrades, and this brings about some nice additions to the board. It technically offers Gigabit ethernet, but it is hobbled by the bandwidth of the USB 2.0 bus. Still, it does mean a substantial increase in wired connectivity speed. Additionally, the N-wireless is now accompanied with AC and Bluetooth 4.2 compatibility. There's also a new set of headers for connecting to "Power over Ethernet" ("PoE"), which means with the right hat add-on, you can power your Pi across the network cable itself, without additional wiring.
Still, if you want to take advantage of the clear-out pricing on the Pi 3 (while in stock), head over here!