Funny enough I adore filet mignon but most steakhouses(if not all) age it and usually serve it with bacon which adds flavor.
With respect to Wagyu, I'd love to get my hands on some A5 tenderloin. Would be pretty delicious and be best of both worlds.
They age it for a reason. I personally never liked cured beef because I felt it took away from its texture. It breaks down the beef's fibers and, while it accentuates its overall flavor, it also removes moisture. That's not a trade-off I used to be willing to make personally. If I ever saw a piece of steak served with a dollop of "herb butter" on it I asked for my meal to be replaced.
May I suggest you try a top "baseball" sirloin cut instead of the filet? Has to be rare though due to its thickness, but it is a nice compromise to the filet as it adds more flavor while also delivering tenderness.
I had a skirt steak once in New York, one of the best steaks I have ever had. Tough, inexpensive cut, but when done right, the taste is phenomenal. Talk about beefy flavour.
I agree. Cow's belly/rib "off-cuts" are the very best of the entire animal IMO. Those are the jewels no filet mignon can ever dream to compete with IMO.
They deliver by far the most flavor. With the skirt steak you also have the benfit of its large surface area. It takes to marinating very well, but the marinades (at least the reasonable ones) don't take it over. The skirt steak is a treat grilled rare and served with something like a fresh salsa verde (which can also be used as a marinade for it perfectly).