I didn't want to make a big announcement on stream or on the repo so people rush out and buy a dev board they'll never use (the fate of most dev boards). That said, as long as you take full responsibility for your own purchasing decisions and don't come blaming me after buyer's remorse, I'll go over what I use personally and what I plan to recommend "officially" once we get further along.
The recommended low-end board is the Arty A7:
In order to make this usable for some of our basic projects, you'll need to buy these Pmods:
If you don't have a display that's VGA capable or a PS/2 mouse or keyboard in a closet somewhere, you'll also need to get converters for that on your own.
Note: The Arty A7's board FPGA is very small in terms of the FPGA resources itself, so this absolutely won't scale to some of our later projects. But I think it's the right option starting out for most people, and you can do a lot of cool projects on it beyond Bitwise. And if you find yourself growing out of it and into the higher-end board I'm about to describe, the relative price of the A7 is small enough that it shouldn't feel like a waste, and you can reuse the Pmods.
The high-end board is the Nexys Video:
As you can see, it's a lot more expensive, but it has a large FPGA (the largest in the Artix class) and some higher-end peripherals. So I wouldn't recommend it until you know you're committed and you'll find some serious, long-term use for this. And even if you get the Nexys Video, you'll need the recommended Pmods (at least the VGA one, but I'd recommend getting the whole set) to follow along early since we'll do VGA support well before HDMI support, for example.