Need a new HD

[M4A1]

I need a new HD - something bigger than a Samsung 500GB. I have to send this 500GB to Samsung for a replacement since I've been getting intermittent boot failures. Ideally, I'd like to have 2 hard drives (not RAID). One of which will boot my OS and the other strictly for storage. Can anyone recommend a HD that's 1 - 1.5 TB OEM?

CPU: Intel Core i5 720 2.66 GHz
RAM: G.SKILL Ripjaws Series 4GB (2 x 2GB) 240-Pin DDR3 SDRAM 1600 (PC3 12800)
MOBO: GIGABYTE GA-P55-UD4P LGA 1156 Intel P55
GPU: XFX HD-489A-ZDFC Radeon HD 4890 1GB 256-bit GDDR5 PCI Express 2.0 x16 HDCP
PSU: OCZ StealthXStream OCZ700SXS 700W ATX12V / EPS12V SLI Ready CrossFire Ready
CASE: CoolerMaster CM 690
OS: Windows 7 Professional 64-bit
MONITOR: Samsung 225BW 22"

 

[Yami]

Western Digital Caviar Blue, 1TB or 1.5TB as you said

 

[Trotter]

OS - Newegg.com - Western Digital Caviar Black WD5001AALS 500GB 7200 RPM 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive

Data - Newegg.com - Western Digital Caviar Green WD15EADS 1.5TB 32MB Cache SATA 3.0Gb/s 3.5" Internal Hard Drive -Bare Drive