so heading to the states next week, my trip includes breakfast everyday, do you think $60 a day for lunch and evening meal is enough? i dont plan on doing any big shopping spree's.

Hey Big Spender! (Always wanted to say that). Seriously, that's more than enough.  Comparison used worldwide to estimate spending is price of a Big Mac meal, which is around 10 dollars.  Travellite.

It really depends on the type of meals you want,if you are in a city,there will be quite a range of restaurants,from inexpensive to very expensive.If you are in a smaller town,or,place there may not be much choice.Bear in mind that US portions are usually large,do not be afraid to ask for a doggie bag,if you can only manage part of the meal,particularly sandwiches.

I returned from the USA last week, I allowed $50 dollars per day but it was more than enough and I came back with a bit to spare.  The meals varied in price greatly depending on what one wanted to eat; in some cases a meal cost only about $10 but on two occasions I splashed out and spent $50.  On a few occasions lunch had to bought in a Walmart store as we were on the coach travelling between destinations and I guess the average spent there was about $10 for a salad or sandwich with crisps and a drink.  I also bought a few souvenirs.

Hope this helps.  Have a great time.  The scenery was fantastic, better than I hoped!