Any pluses or minuses to the older McIntosh mc275 compared to the newer mc275's IV, V, VI?

Thank You effischer, dweller & elevich!  Effischer, so I guess the IV's are the best because of the unbalanced input gain? I'm new to high end stuff so that's way over my head but I'll Google it. Can the IV's be upgraded to having the bullet/spade combo terminals? Dweller, I would only go to the Klipschicorns if I'm not happy with the La Scala's. The only Klipsch speakers I've ever heard were the Klipschicorns 20+ years ago & I never forgotten them! From what I've read I'm sure I'll be happy with the La Scala's! I just got the La Scala's recently (I don't have corners for them) & I'm gathering up the components to hook them up. I hooked the La Scala's up to my old stuff & just like I read. If your components aren't good the speakers will sound bad! I googled the CD player I have & it's going for $15 used on ebay  LOL... I've got a Oppo Sonica DAC that should be here Wednesday & need amp & preamp. Elevick, I was going to go with the McIntosh 2125 but I mostly listen to rock & was told the extra watts would be better. To have watts in reserve? I'm new so a lot of what I read goes WAY over my head! And that the mc275 was perfect for the Scala's... Thanks again! A million dollars worth of info here!     Bill

Thank You effischer! Adjustable gain wouldn't matter to me. And XLR connections wouldn't be on an old Mc preamp I so don't need that either. I found a mc240 in mint condition. Is it's 40 watts enough to provide greater control & more depth to my music? Or would the mc275 be better? Tube rolling? Hmm, never heard of that before! This sounds like another expensive hobby for me!  Lol... Move speakers around? Didn't realize that would make a difference with La Scala's. But I'll try it...   Thanks again!   Bill

Thank You effischer & sfall! Ah ha! So that's why a higher watt amp is beneficial! Even though La Scala's can run with only 1-2 watts the higher watts help the woofers! Yes! It is about enjoying the music! The only Klipsch speakers I've ever heard (except for surround sound at best buy) were Klipschicorns 25 years ago. Never forgot them! I went to a house to purchase something on craigslist & Klipschicorns were playing. No way I can remember what I bought from the guy but I do remember his Klipsch's! Oh, I take that back. The first day I got my La Scala's I hooked up the amp & cd player that I've had in storage for 20+ years. I found out what La Scala's sound like hooked up to poor equipment!  LOL... I then Googled my cd player on ebay & there was one for sale for $15! (and the model was discontinued years ago)...   Thanks again!   Bill

wolf_garcia, why is it to late now?