Needing to replace thirty year old speakers.

Speaker choices are so subjective, that I hesitate to suggest anything, but I replaced some 30 year-old speakers three years ago; they were the Infinity Modulus speakers, which I still think sound pretty good in my second system.  I ended up replacing them in my main system with Fyne Audio F-702s, which are now well above your price level.  However, given that you already have subwoofers, the F-700s bookshelf/stand model might fit the bill.  When I went searching for speakers, I had speakers in the $4000 to $6000 range in mind, but when I heard the Fyne F-702s, I was hooked, and I think the F-700 has the same tweeter.  The sound quality: tonal qualities, resolution, and imaging are superb.  Also, I believe the F-700s are made in Scotland.

Another speaker line I would look at is the Canadian-made Paradigm Founder series.  I have the lower Premiere series and am very pleased with the sound of the 200b bookshelf model.  The floor standing Founder 100F is just above your $5K mark for a pair, and it might obviate the need for the subwoofers.  But, again, speaker choices are quite personal and very subjective.

Happy hunting.

My ears tell me Magnepan. I have auditioned speakers at this price point, and Maggies knocked me out. I can't get them because they are large and blocky and too ugly for my wife's taste. Your wife, or you yourself, may a have similar reaction. But they sound amazing. I opted for Spatial M5 Sapphire Open Baffle speakers, which are more neutral sounding than the Maggies and look great. The Spatials need 3 feet of space behind them to sound their best. Not sure about the Maggies. 

@mbruflodt25, As usual suggestions all over the place some of which you should totally ignore. Except for the clown denigrating Richard Vandersteen speakers I'm sure they are all well intentioned but some are ignorant of how the speakers interact with the room. 

First and foremost do not get rid of those two good subs you have. They are paramount to good sound. All rooms have modes and to defeat these problems requires bass sources that can be set to counter the inevitable peaks and nulls that are the bane of the audiophile's life. The SVS subs are particularly good for this because they have the desireable adjustable phase feature and much more. Understand that variable phase allows you to literally place the subs where they best fit the room. I can assure you from the many subs I've dialled in that once you've heard them used as tuning devices you would never go back to a room plagued by peaks and nulls. Keep the subs!

Also ignore advice to use 'Brand WXYZ' big fat floorstanders and get rid of the subs because they are fullrange.  Well let me tell those recommending this approach that the low frequencies combining constuctively causing peaks and destructively causing nulls that the long wavelengths don't care a dot what speakers they are. If I'm not explaining that well just know that all speakers need help from subs.

The absolute best is to use subs, some judicious room treatment and measurement.

If your amp is using KT88s on the output stage prefferably choose a speaker with a benign impedance plot around 8 ohms and of mid to high sensitivity. Vandersteens are excellent value and would shine with your amp. Another brand and is what I would aim for is Volti, not well known but are easy to drive with sensitivities at 97dB/octave and higher. 

Volti Audio - High Sensitivity Horn Speakers

Good luck

Plus 1 @ghdprentice 

I have had 14-15 pairs of speakers in the last fifty years and I found that my ears don’t like metal tweeters or midrange drivers of any sort.  No beryllium, no aluminum tweeters for me, they all hurt my ears now I’m back to silk tweeters and my ears have never been happier. Two of the fifteen speakers I’ve had have been Sonus Farber and the ones I now have are my favorite and forever. 
 

All the best.