I own the Bolero's and have listened to the Minuets, including stacked Minuets which I really liked, and the Sonata III. I thought the Sonata III was a bit over the top - they sounded much like a lot of other 'high end' speakers. They are all voiced differently. There really is no 'house' sound. They are all excellent speakers. I understand, but have not heard, that the Preludes are quite a bit like the Minuets. On a budget I would explore them. Also, on the used market I would want to consider the Sonata II or the Sonatina's. You rarely see them on the market but I would jump on a pair of the 17's with the SOTA Dynaudio tweeter if I saw them
FWIW.
FWIW.