Wilson better than Thiels?

If you can't decide, then there is no reason to do it, save your money.

That aside, you need to post your entire system, and tell us what you like/dislike currently, what you hope to achieve, and your budget. Cheers,

Spencer

In my heart, what you need is a turntable, but that's for another thread.

Have you access to some other speaker cables to try w/your Thiels, perhaps MIT?

You've got a great preamp, and amps that are often paired with Thiels, so it's tough to nail it down. When you say, "a bit more openness and a better sense of realism", that just begs for analog...Cheers,
Spencer