I would say it's not worth the price, at least not that large of a price difference. I've got both a Phenom and a Phenom II, I can without a doubt say the Phenom II is a better processor, but not $180 better.
Are the prices really that different? In the US, you can get a phenom II 955 for just ~$180.
In agreement with everyone else, the price probably isn't worth the extra performance, but you should check out the athlon II quad core, which would probably beat the phenom 9950 by a little bit, and it would also OC better if that's your thing.
Sorry, my bad. I didn't knew that the motherboards in both configurations are gonna be different, I wasn't informed about that (my friend made those offers for me). So the motherboard thats in conf. with AMD 955 costs more than that in 9950.
Again sorry, my bad..
So i've bought a computer 3 weeks ago, and configuration is:
Motherboard: Asus M4A785TD-V EVO (has integrated graphic card, can work in Crossfire)
CPU: AMD Phenom II 945, x4, 3.0GHz
Graphic card: ATI Radeon HD 4800 (with 512Mb DDR5)
Windows 7 64-bit