What do you recommend for:

Asus P5Q - Intel P45/ICH10R, Intel QuadCore Q6600 2.4Ghz,
OCZ2P10004GK PC2-8000 4GB Platinum Edition Dual Channel,
Western Digital HD WD6400AAKS 640GB SATA 16MB
ASUS GeForce EN9800GT HB/HTDI/512M PCI-E DDR3

Motherboard has ALC1200 HD 8-Channel Audio and Gigabit Ethernet as well. (Marvell Chipset)

I've tried iDeneb v3 10.5.5 and I kept getting a bunch of issues on boot, fatal errors, etc.

Thanks