Tybio, you mentioned clarity of dialog in movies: well, I've recently joined the ranks of Magnepan owners, and clarity is their specialty.
You can jump in fairly reasonably with their lower-end stuff. They make planar speakers - no box, just a frame to hold the speaker diaphragm.
They actually have a few options for center channel. They have typical center-channel speakers which you would place above or below your screen, but they also have wall-mounted speakers that mount on either side of your TV to create an excellent audio image for the center channel.
You can read up on the MMG line at www.magnepan.com
. There are links for MMG, MMG C, & MMG W on the main page so you can read up on them.
I currently have an MMG-C (center channel), and an older model that's similar to the MMG main speakers.
The wall-mount version is the MMG-W, which can be used as either left & right channels, as a dual-speaker center channel, flanking your TV/screen, and as surround speakers.
The MMG line is available direct from the factory, as Magnepan dealers often don't carry the entry-level line.
Typical setup would be MMG for L/R, MMG C for center channel, and MMG W for surrounds,(but many choose to use MMG W for surrounds and center channel, and some opt for MMG W for L/R also, but you would need a subwoofer or DWM bass panel, as the W & C speakers only go down to 100 Hz, while the full-sized MMG goes to 50 Hz.
Magnepan does clarity really well.