Well, the Maximus is kinda pricy. Those things do overclock very well, so if that’s something you’d like to push to the limit, keep it. Same if you’ll use all the included accessories. If not, look for something else, as that board runs $350-400 here in the US. Asus, Gigabyte, and MSI all produce Z77 motherboards that will offer identical performance for about half the cost. Unless you’re dead-set on this board, I can think of a lot better use for the money you can save using a cheaper alternative.
CPU: Are you overclocking or planning to do so? If stock speeds are your game, the non-K variant can save some money.
RAM: Unless getting the quad-channel kit is cheaper than a dual-channel kit, you won’t gain anything from it. The Z77 platform’s memory set up is dual-channel.
HDD: SSD’s are fast, but depending on your storage needs, you might want to round it out with a larger, traditional hard drive, say a 2 terabyte one. Prices have become reasonable, so depending on the budget, it’s something to consider.
Power supply: I’m not confident in Aerocool’s power supply line to recommend keeping them. The most I can come up with seems to indicate a mediocre product at best. An equivalent from Antec, such as their Hi-current line, Corsair, Thermaltake, or Enermax with the 700W rating would be a much better choice. You don’t want to skimp on this component, and bad things happen when your cheap, junk power supply dies.
Case: I don’t see anything wrong with it.
Cooling: Are you overclocking? If not, the stock cooler will be fine. If you are, it will work, but you may not get as high as with a better cooler, nor will it cool as well.
Graphics Card: You might want to consider a Radeon 7800 series card as they may run a little less and offer similar or better performance than the GeForce 660Ti.