Browns are totally disappointing switches. Reds are commonly recommended for gaming, great, no tactility, some may like them, so. I have used, extensively, every switch (including MX Grey) available and blues/ greens are by far my favourite. Blues are great switches, perfect for typing, great feedback however, they are quite audible.
60% is the future, if you can live without the numpad and arrow keys, (of course, these can be remapped under a Fn layer). I cannot use a fullsize board now, they take up way to much desk real estate, even my Filco TKL boards take up too much space since I've acclimatized to the dinky 60% footprint. If you don't believe me, I have a HHKB Pro 2, V60 and Poker 2 that regularly get switched around my desk.
Your only real options for a half decent MX board under 100 are the CM series and lower end Ducky boards IMHO. There are the Corsair boards, with the RGB switches, however I have not used these so I can't comment.
Personally, if you can afford it, I would recommend a Filco board, they are great boards (especially in the TKL form, I have 2) if you want to try out a board without a numpad to see how you get on. They come in ISO and ANSI standard layouts (proper sized bottom row cap sizing), excellent built quality and easy to mod. They run around 130 new however, but can often be found second hand under 100.
Just my 2 cents, I don't like keyboards (lies).
EDIT:- MX Brown uses the same springs are red switches, browns have a 'meh' bump half way down and are semi audible