Speaker Upgrade?

I agree with recommendation for the Spendor SP3/1P, providing the inimitable, beautiful, British sound. When I used a 35 watts per channel tube amp, there was no way to make these ever sound harsh, even with poor recordings. If you want a more modern, elegant look, consider Platinum Audio Solo's, one of the reasonable sized monitor speakers which the same 35 tube watts per channel drove beautifully, against the advice of the giant transistor amp boys. The clarity was even better, and the bass extension in another world compared to the more reserved Spendor. If your wife will be listening with you, the Spendor is more relaxed, and less dramatic, and that might tip the scales.

If you really are inclined to stay within your current budget, is there a way to apply a cosmetic finish on the GMA Europa cabinet to blend with the decor your wife prefers? This would be only if you end up picking the Europa.
I recently visited an audiophile whose obtrusive, giant Klipschorn bass cabinets were delicately decorated with a floral design, I think applied by an artistic wife.
Please arrange to listen to your choice of speakers, in person. Even if it is not in your own home, you can get a sense of overall quality, especially bass output, the Achilles heel of some stand mounted monitor speakers.
Your request for advice at $2000 level raises the possibility of Platinum Audio Reference 1's which are able to sound musical, clear, and full range, even with modest tube amp output in moderate sized room, although to really storm the heavens they can benefit from BIG AMPS. This is one of those speakers where the sound simply cannot be coming from such modest sized cabinets. This avoids taking over your room visually, but is definitely a modern design, not for early American or antique decor.
Since this is a hobby for you, it would be fun to make a change now, in your budget, and if you have actually listened to your choice there will be no buyer's remorse. There will always be a "better" component at a higher price, but why delay what can be enjoyed in the present?

I meant: "a change now, staying within your budget,"
At least, when I run in the primaries that is what I mean.