The shocks from the Mach I are really nice. They are manufactured by Tokico and are the "Premiums" minus the blue paint and slightly revised valving. They are great with springs like the Eibach Pros, H&R SS, Steeda Sport and others that don't have incredibly high spring rates. I have been using mine for nearly a year with my H&R SS springs and it rides like the day I installed them. Plus, you can get all four for about $200 shipped. You might want to try:
If you want smooth I would stick with what he mach 1's I think. best buy. IF you want a little of both I would look at the Illuminas or kyb makes and adjustable. of course that will cost you more.