Faster time from .. lightweight wheels .. or suspension ?

[vijen6]

The car is a 2001 Box S and currently have 19" ebay "Miro" brand wheels on it. Not sure how much they weight but since it came "stock" to me with OEM 18" chrome, maybe not much more than "stock". My best guestimate is in the 25# range not including tires. Suspension is completely stock.

The car is technically my streetcar but will mostly be used for AX. I have a bike so I only drive maybe 2500 miles / year on the high end. This basically translate to "I don't mind going a bit stiff with the new suspension".

My question is:

If you guys had about 3-4k to do either of those mods, which would be a better mod to improve AX time?

If I go for wheels, it will be TE-37s ( yeah JDM on Boxster .. LOL ) 8.5" in front, and 10.5" in the rear .. similar to what I have on now with the MiRo wheels .. should be about $3.5k after tires are added in.

Not sure yet about coilovers.