Vintage Speaker Choice

Are you open to other Vintage choices. I have had quite a few in the price you refer to and would be happy to suggest a few. 

Large Advents.  If you can swing it go for stacked Advents.  I had an original wood pair and added a pair of new large Advents a couple of years later.  Nice improvement. I replaced them years ago, but mine are still in boxes in my spare room.  If you get a pair check the woofer surrounds.

ESS AMT 1A

I had a pair of Infinity 1001A’s that I LOVED. It had a rear tweeter . Sounded great in a bedroom, listening to the old rock and roll of the 70’s. My wife had the Advents in her deli, they were good also

Many of the Vintage "L" line of JBL like  L19, L26, L40, L50 are all good. The Celestion Ditton 33, 44, even 66 are around at that price sometimes. Recapping these provides huge gains and is easy to do. IMF TLS 50's are very good too but should also recap. 

Obviously many more but there is a few in the price range :I am sure you would enjoy.

Not to derail the thread but  I can't resist a comment. I haven't heard a new $400 speaker that is close to these  "Ancient history" speakers.