Need advice/opinion in choosing Vandy 2ci or Thiel 1.5

it was some 20 years ago, but my one very notable point of recall on the thiel 1.5’s was their lack of height… seemed to have the soundstage rather low (waist height)

I think that those speakers were noted to be romantic. ;)

(I would have been spinning the Barry White discs.)

I've never heard either one, but I'd think with both of these, their Vifa drivers must be pretty darned old by now so you might want to just check condition of the surrounds and cones.

I have to agree with @Holmz re: the Vandersteens 2’s unfussy compatibility with various amps. One of the most accommodating speakers I know of in that regard. Though I do have a particular fondness for PSE, McCormack and Audio Research with them.

I've been around the block a time or 3. The only reason I remember specific components and model numbers I've heard as far back as 49 years is because they impressed. I heard a pair of Vandersteen 2Ci about 20 years ago, now, and they impressed. Haven't heard those particular Thiel. So, can't weigh in on this one. However, someone said it doesn't matter what you like. It matters what your son will like. If possible, both of you should listen to both choices at his place, if possible, and, by all means, tell him what a lucky kid he is to have a dad like you and teach him the proper care, handling & maintenance of vinyl and TT's.