I actually like the matrix alot. My top choice for a no tax credit stove is the drolet deco II, its the only stove in the 1k+ price range that has the modern look I like. The matrix has a similar look, if even more upscale, and since its bigger, 3k makes sense. It would be my top choice if it was >75% HHV. But its 69% which is rather low. I'm looking at the 3k mark for tax credit qualified stoves, but closer to 1k for non tax credit stoves. They both come out to about 4k after installation. But there really aren't many (or any) good looking (subjective) contemporary choices around 3k thats 75%HHV. Both the BK Boxer and Ideal steel have a very unfinished, almost prototype look to it. That's not the kind of contemporary or vibe I'm going for! This is actually really strange for me, I'm an engineer and I very rarely make life choices with this much weight on looks. That includes my car. Always function first. But with this stove, its athletics is almost the function itself. Feel strange to care this much about looks. Thats usually my sister's department (she's an architect).I'll second the recommendations for Drolet and Osburn stoves. Most (if not all) of them are non-cat, so like has been discussed, the flame visuals are better. They hold up well and have a good reputation for build quality and longevity. Also, they are easy to buy parts for straight from the manufacturer.
Check out the Osburn Matrix stove - it has a more modern look which seems to match what you would like. It costs around $3000, but if you wanted to burn more often than just occasionally you could potentially recoup some money with less heat pump runtime.