It's difficult to recommend individual sales right now if you're going to wait, but I can recommend what hardware to look for in your price and recommendable performance ranges.
A Radeon 7870 is probably the graphics card that you'd want. An Intel i5-3450 is the CPU that you might want to watch for with a good Z77 motherboard to match. A 2x4GB DDR3-1600 9-9-24 memory kit is probably the best option. A Western Digital Caviar Blue or Caviar Black would be the hard drive brands that I'd recommend.
For the 7870, MSI is probably the best brand. For the memory, G.Skill or Crucial are generally the best brands with Corsair and a few others being almost as good. Gigabyte, ASRock, or MSI, especially ASRock, are generally the best brads for the Z77 motherboards. Asus is also good, but Asus can often be more picky about memory.
A lot of cases can be good, but I tend to prefer HAF cases. Corsair is often the best PSU brand for the money, but Seasonic and Antec are also great and often slightly better quality, just not priced as well.