Speaker Suggestion for Audio Research VSi75


I've been itching to get back to tubes and was able to pick up a like new Audio Research VSi75 integrated.

I'm not shopping for a set of speakers that pair well with this amp and ideally looking at the used market to optimize my roi. This makes auditions challenging so looking for any recommendations. 

I'm looking for a smaller set of towers for an office space (room is about 14 x 20). I'd like some nice bottom end, silky mid range and highs.

I'd like to stay around $5000 but have some flexibility.

My local dealer is recommending some trade in Wilson Audio Sophias 1.....but would love to hear thoughts from folks who might have experience in this config.
darron
I have a pair of Harbeth SLH5 plus in mint condition I might sell.  They are in perfect condition.
I have a VSi55 in my office with Harbeth Super HL5 Plus.  Sounds fantastic and doesn't take up too much space.  I use a subwoofer with them.  Until recently I also used it with Focal Electra 1008 BE speakers and that was a nice combination.  They are not going to deliver a lot of bottom end, but do offer a surprisingly solid bottom for their size.  Again, I used them with a sub.