It you opened up your speakers and checked out the crossovers, 97% of us would probably find electrolytic caps, sandcast resistors. At best, you might find a generic polypropylene cap on the tweeter.
It's called maximizing profit margin.
You want to know where you will often find the best quality/value? Speaker KITS! Heck, I was just looking at Parts Express, the Solstice kit. It sells for $1500/pr., the woofers alone are $360 Morel drivers x 4. Talk about value. And you can tweak those crossover parts, wiring, posts, at will.