xeon Absolute BEST LGA 775/771 processor?

[H0R53]

I do not plan on getting an updated motherboard anytime soon. I like LGA 775/771 and plan to stick with it until it is completely obsolete in another 5-10 years. Right now I'm running an Intel Xeon X5460 via BIOS mod and mod sticker. This is the first time I have exceeded 3GHz in any computer (my old i7 laptop had a turbo of 3.1GHz, turbo doesn't count). I know I can get "better for cheaper" but right now $200 for a motherboard/CPU combo is way out of range for me. I can front around $85 for a new CPU, not a problem. Please don't tell me to buy "updated" or "newer" parts.

 

I'm looking for the absolute best processor my motherboard can support. It supports all Xeon CPUs that are not 1600mhz. So far my research has been inconclusive, and I am afraid that I have already reached the fastest CPU this board can handle without crapping its pants. I am getting two more 2GB sticks of unbuffered ECC memory because in another thread I concluded it's supported and is 20-40% cheaper than non ECC memory, for a total of 8GB.

 

Any CPUs that aren't ridiculously overpriced that you guys would recommend?

[Altecice]

whats your mobo?