You NEED an iPhone right now? So get one then instead of dancing around the subject and saying stuff like "this will probably be my last post in this thread" and that you will wait just because people said so.
If you are not an early adopter and don't want to "waste" a few hundred notes over a couple of years, get a current iPhone 3G and enjoy it. Deep down though, you know you want the new phone, you know you will regret it eventually if you buy the current model, and you just came here to get get others to justify your own decisions. When you don't hear what you want to hear, you whine at people not giving reasonable hardware justifications...do some research yourself you lazy bugger! The chances are, it's going to be an evolutionary upgrade with a metal back, better battery life, better camera, and maybe a magnetometer (compass).
The reason why most people are suggesting you wait is because most people are not stupid enough to buy an expensive phone knowing it is likely to be replaced in the next couple of months. That's all there is to it really - money should not be such a consideration if you want an iPhone. Either way, it's going to cost you.
I want an iPhone. I'd like one now so that I can use its features on some up-coming trips I'm going on. However, I am waiting to see what Apple announce before making any decisions. If no new iPhone is announced, I'll get a current model. If one is announced and I don't feel it's worth the extra money, I'll get a current model. Common sense really.
Grow up, think for yourself for a change, make a decision, and stop worrying about it.