I've owned and enjoyed SC-IV, SC-IVa, SC-V over the years. Am presently using SC-IV, SC-III for center channel, SC-II for surrounds for a very effective home theatre system. This system has just the right ammount of resolution and will play all the great lease breaking movie soundtracks at very high volumes. One word of caution on early SC-V. The early models had DOME MIDRANGES, yes DOME midranges. These drivers were problematical- I had one or two crap out at fairly high, but not extreme, volume levels. This problem was pretty common and in the later SC-V they replaced the dome midrages with the more conventional cone midrange drivers and I don't beleive thay had any further midrange driver failures. Dunlavys are a very well balanced speaker and an excellent value at current used prices.