Rwwear...here we go again. I owned the LS16MKII for almost 2 years and found it to have excellent bass response and control, a wide and deep soundstage, open and smooth mids and just a wonderful presentation. I did use the 6H30 "DR" tubes in it, but the stock 6H30 tubes are excellent. The "DR" tubes takes an already great performer up a notch or two.
You have mentioned your dislike for the LS16MKII before, but you've never said you actually owned one and heard it in YOUR system, in YOUR room and with YOUR music? If you heard it in passing at a show or at a dealer, that doesn't really count for much does it? Maybe you heard a defective unit or one that wasn't warmed up/broken in yet. I have read every online review, (which there are many) from professional to consumer and NONE of them agree with your comments? Humph?
Valhalla, the LS16MKII is a wonderful piece of gear as is the LS17. I haven't A/Bed the two, but I think you would be happy with either one.