I probably wouldn't make that many adjustments, to be honest. I'd eat beef, vegetables, tubers and fruit, omega 3 eggs, and maybe some canned sardines. I would try to minimize the conventional pork and poultry fat, because of O6 concerns. I would also avoid conventional dairy. Other than that though, I'd just try to avoid your neolithic agents because I think that's even more important than eating grassfed, wild caught,etc. all the time.

To Mari's answer I would also add to stay away from the "dirty dozen" most pesticide laden veggies and fruits http://green.yahoo.com/blog/daily_green_news/332/the-new-dirty-dozen-12-foods-to-eat-organic-and-avoid-pesticide-residue.html. If you aren't going organic and to wash your produce thoroughly.

I'd probably pop some fish oil, and ditto on Ashley Roze's thoughts on produce. I love strawberries for example, but I have a hard time finding reasonably priced organic ones, so I usually end up getting conventional ones and letting them sit in a bowl of filtered water for half an hr.

Ideal is relative - try to supplement with fish oil - I generally get organic veggies - not too expensive at farmers market - wild fish (canned or at fish store) if not too expensive - always organic eggs (I'll pay the extra buck)- on disability I live on $50 a month on food - sometimes don't quite make it - but chicken livers are all "organic" and cheap - $2 and I get 2 meals from a carton - I've had great results!