As alluded to by others, don't forget though that airspeed doesn't have much to do with it. It's descent rate that determines how softly a plane lands. My Kaos lands fairly fast because I like to do those pretty greaser landings with it, but it touches down very softly. On the other hand, when I was learning my trainer used to put the wheels down with almost no airspeed and bounce like crazy because I often stalled it out a foot off the ground.

On the topic of stiffer LG's, low-bounce tires and such, if you need those things on a sport plane then you're just not landing properly. Even LG placement isn't crucial if the pilot is setting the plane down gently on the wheels instead of slamming it down. The way lots of aeromodelers land would result in back surgery after a couple of years if they were full scale pilots. If you manage your airspeed and therefore lift so that the lift being produced is 99% of the plane's weight at the moment the wheels touch, there is no way for the plane to bounce. What has helped me is to keep flying the plane all the way until all the weight is on the gear, which is a 2-3 second process when you do it right. You touch down with no weight on the wheels, then you let the plane slow and kill the lift to transfer the weight from the wing to the wheels.

One thing that has not yet been mentioned is the value of managing the throttle during landings. If the pilot sees that the plane is settling in (losing lift) too fast, a bump of the throttle will save the landing by slowing the descent. Many new pilots go to idle and try to glide the plane in. Sure that works if you manage your approach right and the wind doesn't mess with you, but the throttle comes in handy quite often. What I've learned to do is intentionally come in a little short and establish a slight flare, then throttle the plane down to the ground much like a helicopter pilot does.