my advice, based on using cheap, middle of the road and quality routers over the last four years making wooden surfboards, is buy the best you can afford.
i use routers daily and since swapping over to makita ones i have never looked back. for my main cutting work i use a 1/2" rp2301 which is a big router but easy to handle, i also use a makita rt0700 which is a small handheld 1/4" router/laminate trimmer and is a genius thing.
the only other thing is don’t scrimp on router bits, again buy the best you can afford.