If your TV/Monitor and graphics card can do 50Hz then (IMO) you have something far better with WinUAE. Smooth scrolling is a must. If you've never run WinUAE at 50Hz then you don't know what you're missing.
FPGA Replay is no more "real amiga hardware" than a PC running WinUAE. But the boot time and form factor (at least of MiniMig v1.1) has it's advantages over a PC.