Looking at the results, I'm surprised to see the X58 and P55 setup perform so close to each other. To be honest, though, I'm not sure if I'm surprised that the P55 performs close to the X58 or surprised that the X58 doesn't perform better when compared to the P55. It doesn't matter which way you look at it, the P55 performs extremely well against the more expensive X58 setup.
The biggest reason why the numbers are so close to each other is because I think we chose to put it on as close a playing field as possible. What this really means that if you're into overclocking and happy to do it, then you'll probably find yourself getting performance similar to that of an X58 setup at the same speed. If you're able to pull even more MHz out of your P55 setup than a friends, your machine will probably end up running faster.
As for the RAM, there's no surprises from OCZ. You've got a great couple of kits here for people who don't want to spend huge money. They might look a bit boring, but if you play around with the dividers and have a decent CPU, getting 4GHz off a X58 or P55 setup with either kit shouldn't be a problem.
While all of a sudden the X58 setup might be feeling a bit obsolete, you have to remember that if you're interested in going down the two or more video card route then the dual x16 ports on offer from the X58 setup is going to be much more appreciated. Of course, something like the HD 5970 which uses only a single slot is going to go well on both systems.