Those Eibach springs are going to make the ride more harsh than stock. Combining that with oversized rims with even less sidewall is gonna make it even more harsh. If that's your cup of tea, go for it. For the price of the rims/tires you might get consider getting a set of coilovers that are dampening/compression adjustable. The KW-V2's that I have are great even if they are only compression adjustable. WAY more comfortable than stock or Eibachs, lowered 1.6 inches, handles great, even though stock handling is pretty good to begin with. You will save money as the KW-V2's are like $1600. You will need rear control arms and either camber bolts ($60) or KMAC camber kit($430 - pretty expensive) in front unless you like a lot of negative camber (which you may already have with the lowered Eibachs). Check out the thread on "lowering" on this forum. Some good suspension guys chime in there.