Sometimes Macs have trouble with the formatting on this site. It can be done, but I'm using a PC, so I don't don't know about Firefox and all that stuff.
Most receivers will drive La Scalas just fine, but of course more power is better. They sound good at low volume, too. Two non-performance factors often make them popular with college students: one, they're too big to easily steal, and two, drunk girls can dance on them in relative safety, although Klipsch recommends against it.
With most Klipsch speakers, the very high sensitivity means that everything going into them is revealed, so if you have noisy and/or low-quality electronics, the speakers will make it more obvious. Crown K2 amps have a good rep on this forum, if you like pro sound gear.
As for Heritage speakers like the La Scalas, one of the things that helps make them long-term keepers is that there are so many ways to upgrade them as your interest and budget increases, so they can grow with you. Mine are 1974 models and in three years I replaced the original crossover capacitors (easy and inexpensive) and the tweeters (with CT125s) and finally did the conversion to bi-amped JubScalas and the improvements at every step were easy to hear.
That's not to say that any mods are needed. They sound fine stock
Another factor in the longevity of the Heritage Series is that they use pro-type woofers with pleated paper surrounds that last practically forever, unlike the foam surrounds that start to rot away after 10 or 15 years. Just change the capacitors (the caps) every 20 or 30 years and you're good to go.