Should I buy an iPhone 4S or the new iPhone 5?

I currently have the iPhone 3GS and it is just not running correctly and it's time for a change. I'm debating weather I should get the iPhone 5 or 4s… The 4s is now a little cheaper now that the 5 is out. But I'm not too sure. Another main reason for switching is that the new iOS 7 will be coming out and it will not function on the 3GS. So I'm not sure which one to switch to.

Get the iPhone 5! It's the newest. I have it and LOVE it!

I'd wait for another month as Apple is coming out with new phones. So either you may like the newer phones better than the 5 or the 5 will drop in price. Then you can compare all the Apple phones available. Now if you get the 5 you may be mad that you bought an older model phone for big bucks. The 4s is fine but slower than the 5, the new ones may be even better and they may also be cheaper as Apple is dropping it's price point on some new models.

If you just care about ios 7 then you can get one or the other. But if you want the latest get iPhone 5 and if you want cheaper get iPhone 4s

If you want to jailbreak iPhone 4S if you don't care about jailbreak iPhone 5

If you have enough money for luxury then I'd get the iPhone 5. The iPhone 4S is a perfect alternative since it's sold at a low budget price and is still able to update to iPhone 5 latest versions.

Hi if you wana buy iphone 5 I will give you for £400 and if you like iPhone 4S then it is just for £300 both are brand new never been use before phone only

Now - get the 5 but make note the 5S is expected in a little over a month

IPhone 4S; Main reasons:
It's upgradeable for iOS 7 and iOS 8 (when iOS 8 is released)
Most iPhone cases are made for 4/4S.
It's very powerful.
Retina display.
Dual core 800mhz A5 chip (same as iPad mini, iPad 2 and iPod Touch 5th Gen)
FaceTime.
Siri.
Etc;