I'd say it's a nice build. When you say to save costs, that's hard to quantify, especially depending on what you'll be using it for (gaming? 3D rendering?). Plenty of people would state that the i7 920 is more processor than you need for gaming. An i5 rig might take care of you enough, but if you want high-end, stick with this.
SSD drives-you'll have great load times into Windows and most programs, but don't expect them to improve gaming much.
If you have the money for the rig, I say go for it.