Site Review with SEO Plan needed

My site has been online for over 5 years and is well SEO'd but i'd like someone with extensive SEO experience to review my site and the top site(s) in my industry and draw up a blueprint of what SEO needs to be done to the site (other than link building). I have a lot of experience with SEO and all the major software programs so will do the work myself but need a solid plan and suggestions from someone with more expertise than myself. Please provide examples of work. About my site: I sell sports/bodybuilding supplements, have high ranking for many of my products and main key words(top 3 in MSN and Yahoo and top 10 in google). My site runs on an asp cart system but uses ISAPI_Rewrite to display pages as .htm