I will happily and sincerely hand out Thanks to anyone who makes suggestions in this thread. I'm replacing the rig in my System Specs. Going back to Intel so I can take advantage of Matrix RAID, for one. It'll be running six 1.5TB drives in Matrix RAID 0/10, and a second onboard SATA controller for optical/temporary other drives would be nice but not necessary. The system will be used primarily for Folding@home, but when game time comes, I want to be able to run Quad SLI + PhysX. It's also for general multimedia, audio recording and editing (recording up to ten channels of audio through Alesis recording interface in System Specs, editing primarily with Adobe Audition), image and video editing, and general misc. computing. I would like to get a quad core but top priority is bang for the buck. 1366 would be nice for max performance. The system will be taxed, running up to 4 9800GX2s, though more likely 2 9800GX2s and 2 8800GTS 512s at first as I have three of my 9800GX2s in an Asus M4A79 Deluxe. If it can also handle running my surveillance system (8 480TVL CCTV cams through a 240fps PCI DVR card), then it will get that too (flexible PCI slot extender available). Budget for CPU + motherboard = $350. For a truly amazing deal (like a used Asus Supercomputer board for half price) budget can be extended up to $385. Looking for absolutely amazing deals, not something I'm likely going to find cheaper next week. Prefer to avoid mail-in rebates. I will consider (and probably will need to buy) open box/used. Private forum sales, Ebay, open box/returns, they're all fine as long as the hardware works. I don't need a CPU HSF or any motherboard accessories. Here's what I need: · 1156 or 1366 socket CPU and motherboard · Matrix RAID support (ICH10R provides it, as do some, but not all P55 boards) · Four (4) PCI Express x16 slots, spaced for double-slot coolers · SLI support I will be overclocking as much as possible without compromising rock solid stability with an S1283 heatsink. This system will not be in a case and will have a box fan cooling it as needed. So, what do you suggest, with all this in mind? 1156 This would be easiest to do on the 1156 platform, due to the availability of lower-priced CPUs. However, if I can get better performance per dollar out of 1366 and stay under $350, that'd be preferred. Here are all 1156 boards with P55 and 4+ PCI Express x16 slots at Newegg. Anyone know of others that meet the requirements? Any on this list that do not support SLI are disqualified. Some may not support Matrix RAID, but some that do not list Matrix RAID support do actually have it; that must be checked with the motherboard manufacturer. 1366 Here I'd have to go i7 920 (unless someone can find a Xeon W3520 cheaper). The best price I can find is $200 at Microcenter, which would be $214 after tax. That leaves $136 for a motherboard. Here are all 1366 boards with ICH10R and 4+ PCI Express x16 slots at Newegg. Anyone know of others that meet the requirements? Any on this list that do not support SLI are disqualified. Edit to add: NF200s are fine by me if needed.