spacers or wider wheels, trying to decide Options

[lagos]

im trying to figure out what would push my rims out more so that they are flush with the body. i think my current rims are 40offset 7in wide. if i get a 25mm spacer, that will push them out about 1 inch.

now my other option is to get 17x8s with 35 offset. i used the offset calculator, and it tells me that the differece between the new rims and my old ones would only be 18mm
http://www.1010tires.com/WheelOffsetCalculator.asp

so, am i missing something here? the spacer would push the wheels out the most, right?

[lagos]

you see, what im really trying to do is to talk myself out of buying the oz superlaggeras that i really want..lol
the spacers cost about 250 shipped while the new rims will be 1500 or so. so if the spacers do the same thing i want, then im tempted to go that way... who knows. its good to know that i will get a wider stance from the spacers, somthing i didnt really realize before.