Yes it'll be cheaper to buy around Christmas/new year normally. Prices change so fast that I wouldn't get a parts list until a day or two at the most before you actually order. So ask again at that time otherwise it's just a waste of time.
In general you'll be looking for these parts.
i5-3570k (from microcenter).
Motherboard, possibly ASRock or other Z77 motherboard.
To keep costs down a Corsair CX500 PSU.
Cheap optical drive.
Case that you like around $50-75(depends on if you want a flashy or just plane looking one).
CPU cooler- a hyper 212 EVO
Then a WD hard drive 500GB to 1TB depending on what you need (I don't like the other brands).
8 GB DDR3 1600 memory
I don't like the MiR's, but it hits your desired budget after all is said and done. You can save a few bucks on RAM, but that ram is rated at 1.5v for 1866mhz. Same with the Motherboard, but, Asus is a top tier brand. I've heard good things about the case from some websites, but its definitely not flashy.