At 30K total there will be significant trade offs, particularly in what you might compromise. I think it would be very easy to leave your friend disappointed. Several very important considerations. First, how much experience with live opera do they have? If it is a lot, where do they sit in the opera house? My wife and I have heard about 150 live operas all over the world and about 800 live symphonic performances. This is not a trival matter and will greatly influence their preferences in the balance of the system. Operas are long, 3-6 hours so listener fatigue is a big consideration. Do they like Wagner and Strauss which means the ability to have good detail played loud with lots of bass or are they bel canto fans where the delicacy of the vocal line is paramount. DVD fans (a whole different discussion) or vintage recording fans (vinyl required) Additionally, since this is for a couple, don't underestimate the likely psychoacoustic differences between the male and female. I have been upgrading my system and recently listened to most speakers in the 10-25k range. Along with my wife were two other women who listen with us regularly and have heard a lot of live opera and symphonic music. Their preferences and perceptions and descriptions, of Dunlavy,Theil, Vandersteen, Martin Logan, Revel,B&W, Sonus Faber, Wilson, etc did not often match mine or the standard reviews but they were consistant to each other. Spectral amps received a thumbs down, tubes a thumbs up.(BTW we bought the Dulavy SC-V which the three of them ranked first, it was my close second choice. Finally, room treatment is of paramount importance to sort out the compexity of a large scale opera. A little goes a long way but alot still improves things. In addition to a dedicated room with passive treatments, I use a Sigtech which is astonishing on Wagner, Mahler, Bruckner and Strauss. I hope this helps. Your friends are going to have to listen to some equipment to settle on their preferred trade offs.