Oldham92
Hacker
When you say "budget", what price are you looking at?
I have always found waterproof trousers a pain because there aren't many cheaper manufacturers out there who make them with an inside leg longer than 33". Proquip are one who do, and the last pair I bought set me back about £60 and do the job just fine.
Preferably about £100 for the full set.
Or less obviously if there's a bargain to be had