Optimize my wordpress website by validation and increasing page load time and fixing errors

My website [login to view URL], is on SSD VPS server, i use maxcdn, cloudflare, wordpress with w3 total cache, xcache, but, still i find my website very slow. In pingdom it gets about 80, while, in gld google page speed 52, it should be 95 at both the places or above. First i want you to prove that you have enough experience, secondly, fix error and validate my site css, and html, without breaking site, then fine tune my site to increase the speed of the website. While you bid, let me know your exact requirements. Please bid only after you visit my site and check everything.