As asked in the subject:

Do any of you guys know some good 3rd party controllers for 360? Which do you use? Why did you buy them?

It seems there aren't that many available or I am unable to search on google for them

And please no advise for "buy the original, they're the best" - I know they are but I have good reasons for searching alternatives

I have a Razor Onza TE. It's great for shooters but the triggers suck for Forza.

tell us these reasons

For fighting games the Mad Catz fighterpad is the only way to go to properly play fighters on the console outside of a traditional fight stick. That D-Pad is just terrible.

We all know Stage, no need to repeat the millionth time... But yes, the fighterpad looks great but I just need another "standard" controller with a standard layout...

Well, I don't want to go into detail but it has to do with a person equipped with boobs that came into my life...

^ go on...

You really need some help if you think that a drag queen doesn't deserve to play with an original 360 controller.

A what?! How dare you... So you don't know other good controllers? Man, what's up with 3rd-party accessoires these days...

Well I have 4 original ones (one wired and 3 wireless) and I don't see the need in getting a third party one, unless it is for a beat'em up games.
I don't get your reason either, do you want to get a special one for her (a pink one for example) just for the looks?
do you want an extremely cheap one, because she wouldn't play much anyway?
or do you want one that makes gaming easier? (Turbo controller etc.)

I mean you could use for example a PS3 controller with the right adapter.