Cherry MX Brown vs Logitech Romer G vs Razer Orange

Solution
Cherry MX Brown is not a keyboard, its a type of switch that is used in keyboards.
I say you get a keyboard with Cherry MX Red Switches, they are really smooth, and feel great. :)
Eg. Corsair K65
What the OP has listed are all switches.

I only have experience with the Cherry MX Brown though so can't compare but I do like the tactile response letting me know when I've hit actuation.
 


Romer G and Razer Orange aren't keyboards either... They are all types of switches used in various types of keyboards.
Blue ones are the loudest with a clicky sound and a tactile actuation. Browns are sort of in the middle of Blue and Red, with Red being very light with a minor amount of sound. Cherry MX switches are really common in keyboards... Logitech's Romer-G switches feel almost like a brown Cherry MX switch with a rubber dome, making the bottom out of the key more soft. I've never actually used a Razer Orange so I cannot give any advice on that one.

I prefer Cherry MX blue switches because of the satisfying sound in every key press, but I love the simple design of the Logitech G810 which has Romer-G switches.