I purchased a set of the low-profile 'Trak Jax' made by 'Race Ramps', and they are pretty darn nice. Very light and you can get them with or without a 1.5" stop. These are only 3" high, which is enough to get a low car up so you can put a jack under it without damaging the vehicle. My car has been lowered quite a lot since installing the KW V3's, so I needed something very low. Race Ramps make a variety of ramps for pretty much anything so give them a look-see.
Howster