Doesn't anyone make an entire car out of all steel anymore?
Sounds like you're still hung up on the cabinet, which is only one aspect of the speaker. What's most important to most people is how the speaker sounds, since that's its job. The cabinet does contribute to the sound: how well braced is it, non-resonating, the correct size, damping or angled walls to reduce standing waves, sealed if it's supposed to be sealed, the correct size for the drivers used.
Also involved are...
These are horn speakers. Does their directivity work for your needs? Do you need super wide horizontal pattern? Do people find those horns harsh? Is the frequency response even? Are the woofers capable enough to keep up with the tweeter, or will the bass be distorted when you turn it up? Does the placement of the drivers and the construction of the crossover give you even phase response? Etc.
The towers extend pretty low in frequency. Which, if you're using a sub, you probably won't need. A consequence of that tuning is that the woofers are probably not that sensitive.
What are the differences between the Icon and Reference lines? I've heard much better things about the upper-end Reference line. And even better about the Heritage line or the Cinema speakers.
Those are the questions, IMO, you should be asking yourself and learning about.