Cobretti2,
I still can't find reliable information on the timing for Haswell's launch but we are starting to get a clearer sense of the timeline. VR-Zone reports April 2013 for high-end Quad core i5/i7 parts and Q2 2013 and later for i3s and low power consumption quads.
http://chinese.vr-zone.com/43824/intel-haswell-cpu-will-release-at-2013-q2-with-13-model-including-4770k-4670k-for-overclocking-12112012/
The chart for the likely clocks and models.
http://www.techpowerup.com/177066/Intel-Core-quot-Haswell-quot-Quad-Core-Desktop-CPU-Lineup-Detailed.html
i5 4670K replaces i5 3570K
i7 4770K replaces i7 3770K
Interestingly enough TDP is 84W, up from 77W, but I am guessing most of that is coming from the more powerful GPU onboard not the CPU itself. The clocks are also unchanged in both stock and Turbo boosted modes, implying Intel is counting on IPC increases from the new architecture. I am somewhat disappointed that Intel isn't even bumping up the clocks given that 22nm node will have had a year to mature by the time Haswell launches.
As far as your choice to find the best GPU (money no barrier), then you should definitely wait to rebuild everything around Haswell and a $500+ GPU. It makes no sense now to spend $470-500 on a GTX680/7970Ghz as those parts are nearly a year old. There are deals to be had like you can pick up 2x GTX670s for $560 now which is amazing given that each such card was $400 at launch. If you want the best though, and have the $ for it, might as well wait to April-May since you seems like you are not in a rush and evaluate your choices between GTX770 SLI / GTX780 / GTX790 or HD8970, etc. For dual cores or more, I'd lean towards Nvidia as SLI tends to feel smoother in gaming than Crossfire does in terms of micro-stutter. Of course for the latest and greatest that would me $1,000 in NV GPUs. I never suggest to future-proof like that. It's one thing to spend $50-100 more on a GPU but $1000 only make sense for people who have a lot of disposable income and resell their GPUs frequently, recouping some of the value after depreciation. You are essentially better off getting just enough and then upgrading more often than buying $1000 of GPUs and keeping them for 5-6 years in hopes of futureproofing.
For instance, GTX280 was $649 around June 2008 and by April 2009, HD4890 delivered similar performance for about $260. GTX480 launched for $500 on March 2010 but by December 2010, GTX570 delivered the same performance for $350. GTX580 was $500 when it launched on December 2010 and now you can see GTX660Ti selling for $220 with faster performance just 2 years later. If you don't mind buying $800-1000 of GPUs and reselling them right before the next generation of cards launches, thus minimizing your ownership costs, then it can work well :)
