Proud owner of some Mission loudspeakers (you may have your own opinion, but I like 'em). I currently have the 77 series, with 771's in front and the 77C1 center channel. I've thought about upgrading the fronts from the 771's, which are really bookshelf speakers, to towers from time to time, but have never pulled the trigger. Found a sale online for the 78 series. Neither the woofers nor the tweeters are identical in materials/composition. My plan would be to retain my 77C1 center and add either the 782's or 783's. The midrange drivers in the 783 is larger than the 5.25" woofers on the 77C1, whereas the 782 has the same size midrange as 77C1, but of a different composition. The tweeters are the same 1" size all around, but the 77C1 uses a fabric dome, whereas the 78 series has a viscous-laminated soft dome tweeter. I see this as a possible issue. Assuming all levels are properly calibrated, am I going to hear a real difference in tone during pans from left-center-right? Is there that much to be gained by buying a series 78 center channel speaker, which has same size drivers as 77C1, but just different materials (but is not on sale). Even with a 78 series center would I still hear a change in tone and/or sibilance in pans due to different sizes of midrange and/or woofers if I purchased the 783's? Hope someone can offer some advice.