It will most probably be used for gaming and chatting, so...
These are the ones that I would like to have

The Microsoft Sidewinder X6


The Razer ARCTOSA


The Saitek Cyborg Keyboard


Please suggest me some keyboards in the same price range as those.

the 3rd one. o alwats buy a ketboard that highlight gamekeys.
also the sidewinder is for left handed gamers, are you left haned

The Sidewinder has a removable numpad if you mean that...
I am also thinking about buying the

Logitech G110

functionality: sidewinder/saitek
attractiveness: razer

funcionality:attractiveness: sidewinder.
no doubt.

that removable keypad for game binding is just win.

I know a lot of people that have been using the Sidwinder for a while and they all say it's the biggest shit they ever bought.
The keys kinda fuck up after a week or to so you can't even type anymore.
I personally have the Saitek and no problems with it.

I've read some reviews on the Saitek Cyborg and many wrote that they had problems with keys stopping to work...
How long do you have your Cyborg already?

If you go for Razr, their Lycosa keyboard is so much nicer. The keys have their soft paint and are lighted

The arctosa, which I have, feels great, but it doesn't have any functions that most gaming boards have.

Anything Das Keyboard or Filco.

I have one, it's talking about the outside keys(cyborg keys) they tend to break easily. Really the keyboard is just a gimmick. They metal coated keys are just painted silver on the inside. It really isn't too terribly bright. They extra keys are a bitch to get working, especially if you lose the cd that comes with it, the software sucks to find. and they touch screeny stuff on the top is highly unresponsive.
Also a few of my LED's died about right away.
sorry for the huge pic but I'm VERY low on uploading bandwidth right now so I didn't use a new pic.

I'd say go with the Razer and the Lycosa. Dont go with the Sidewinder either because microsoft stuff is usually cheap stuff that breaks easily.

Don't go with Razer IMO, go with microsoft or logitech, they put more build quality into their stuff. Personally however I use an old $2 DELL keyboard that I have a bucket full of replacements for, there is no need for expensive keyboards, way over the top. DAS is also very good imo.