i5 on laptops are dual cores, i3s are too i think, you can try cyberpowerPC or newegg, you can get quads on there for $800but most mid-end laptops can run source at lowquads = mid & high end i7slow end i7s are dual
Only Sandybridgei3 & 5 are duals.i3s are dual core in all situations.
Also, i'm looking in the price range between $300-$500
http://www.newegg.com/Product/Product.aspx?Item=N82E16834215120That's probably the best bang you're gonna get in a laptop for $500.It's quad core and has a decent video card.If I was to fulfil your i3/i5 wet dream, your video card would be an integrated Intel HD, which absolutely suck, and you'd only have 2 cores. They are more expensive computers that you should only aim for in the $700-$1000 price range.