Best RAM for Gigabyte P55M-UD2???

I've got a P55M-UD2 on the way and now need to find the best ram for the money. It seems the UD2 is picky about ram, so I'm a bit worried as I'd like to have a simple clean new build after my 775 Q9550 upgrade torment.

The only ram I've been able to find that is on the Gigabyte QVL is this G.skill DDR3-1600:
G.SKILL F3-12800CL9D-4GBNQ

Yesterday it was out of stock, but today it's not, so maybe my search is over.

I was intrigued with the G.skill low voltage eco series since I hope to use 8 gigs.
G.SKILL F3-12800CL7D-4GBECO DDR3-1600 CL7-8-7-24 1.35V
It's not on G.skill's approved list for this motherboard, but it appears they have no 'approved' ram for the P55M-UD2. Low budget builders just don't get the attention.

There is the G.SKILL Ripjaws PC3-12800 4GB 2X2GB DDR3-1600 CL9-9-9-24 , but I worry about the Ripjaw fangs clanging into the Hyper 212 cooler right next door.

Also I'd like to know how feasible it is to have all the ram slots filled with the Hyper 212 pointing skyward in an Antec 300 case.

The main purpose of this new Win7 64bit system other than reading hardware posts on the internet late at night, is audio and video editing with Vegas Pro. Hence the desire for 8 gigs of ram.

Here's the build so far:
i5-750 (Hope to have a mild overclock 3.2-3.4 with Turbo)
P55M-UD2 (Small, but perfect for my needs - eSata, Firewire, 1 PCI slot for Audio interface)
Intel Intel X25-V (Boot drive / App)
Kingston 64Gig Series 2 (Audio sample drive)
WD Black 640gig - data
Asus 240GT (Need the CUDA for a few video plugins - sorry AMD)
Corsair 400cx
Antec 300 case
3x Sflex D case fans
2x Sflex F CPU cooler
1x Arctic Cooling F12 case fan

Thanks for the suggestions!