Have you considered an aftermarket heatsink like the CoolerMaster Hyper 212+ ? It would be a little quieter than the stock Intel heatsink, and it would avoid the terrible push-pin mounting system.
Is the Samsung HD103SJ available for less than the Seagate hard-drive?
Can you get an Asus P8Z68-V LE motherboard instead of an Intel motherboard?
Can you find less expensive PC3-12800 that is on the QVL sheet from the motherboard manufacturer?
i7-2600K, H70, P8P67-M Pro, 16 GiB, HD7950, SSD, 3 HD, Blu-ray, X-Fi Ti Pro, Antec P182, S75CF, 3007WFP+2001FP, RK-9000BR, MX518
i5-3570K, GeminII-S524, P8Z77-M Pro, 16 GiB, HD7770, SSD, 2 HD, Blu-ray, InifiniTV4, NSK2480, 55" TV; Asus UX32VD