The answer depends on how much you want to hate your tooling. The fastest stuff uses all proprietary, heavily licensed/restricted tooling.
I like the lattice stuff for experimenting because you can do the whole stack with free software.
I like the lattice stuff for experimenting because you can do the whole stack with free software.
They are cheap and are supported by the FOSS toolchain. So you won't waste money or wrestle with crappy and/or expensive commercial tools, and can concentrate on learning FPGA.