If I'm not mistaken quite a few members here are using one for gaming, so maybe you could recommend me a good one?

Requirements:
_Cherry Brown switches. Or Red. Or equivalent. Preferably tactile and definitely NOT clicky.
_Macro keys. A few are enough.
_Ability to switch between USB and serial connection a big plus.
_Good software that you can use without any unnecessary registration (Razer?).
_WASD keys NOT coloured differently. For some reason some producers insist on doing this (I'm looking at you Logitech).
_Backlight/secondary colours either blue, red, white, gray or non-existent. Or customizable. Not bright green (Razer) or orange (Logitech) or anything else.

Thank you in advance.

SHIT
My WASD keys are gray so I guess this one is out.

If you lighten your demands, the Logitech G105 is a beauty gaming board, and it won't ruin your budget.

My favorite parts include a button to disable the windows key, so you don't accidentally hit that instead of shift and leave the game. XD Of course, it also lights up with three settings for the brightness.

What are the advantages of a mechanical keyboard compared to ahem...the "normal" ones?

I could live with gray WASD keys, but G105 is not mechanical. So no.

I'm using a Logitech G15 one myself with all the features you mentioned, and it is great too. Been using for about 5 years now, without any major issues (and fortunately this one was produced before they started colouring WASD).

Still, all my requirements are negotiable to an extent, except for it being mechanical.

Damn, I really don't know my tech, do I? :P My apologies. :D

I don't even know what a "mechanical" keyboard is. I imagined something steampunk-y, with a lot of cogs, gears, and made of iron.

Well, I have a razer black widow (all black) mechanical keyboard. Had it for 5 years at least. Its a good keyboard. What I would say is that it makes a lot of noise, the mechanical clicking of the keys, which can get on tour nerves. Has macro keys though I have not used them. I think it means that the mechanism. Rather than having an electric contact which either feels for a finger these have an an actual physical contact. Think of a manual handle against a touchpad. Am not an expert, but apparently the mechanical are more reliable and quicker on key presses. I just got my one cos razer is cool (too much robot wars!).

Yeah, I just googled it. Still, I'm pretty happy with my piece of junk keyboard and my crappy mouse. I don't think I'd notice all that much improvement, if any, if I used the "pro" stuff, since I'm a perpetual n00b, and at least this way I don't have to worry if I spill soda all over my keyboard.

I have this Matias Quiet Pro Keyboard. I'm not sure if it covers all your demands but I like it (excluding the large keys, I prefer flat ones).

While it's not quiet per se, it's far more quiet than most mechanical ones at least if that matters.

I haven't checked but it doesn't seem to cover either some specific software or macros. Regarding macros, can't you use a software to cover that?

How about this one? The main advantage is that they are mechanical.

Well, this explains everything :D
Anyway I did a search, i will stay with my old and cheap keyboard.

Yes, the biological ones can be a bit temperamental.

I can not explain how rubbery and horrible an old keyboard feels after having had red switches for a couple of years now. Just let my gf try the old one after seeing this topic and she was shocked, said it felt like there were suction cups under the keys.

It's hard to explain how much of a difference a mechanical keyboard is once you're used to it.

Personally I have a CM Storm Quickfire Pro. My only complaint about it would be that I would've preferred lighting across the whole keyboard for those nightly sessions, whereas this one currently only covers arrows/wasd area/F1-4/1-5 etc. Still nice but really could use those 6-9's sometimes.

The gf has a Qpad mk-85 which has lighting on the entire board.

Both red switches.

Reliability - durability. But the keystrokes are noisy.