the Mark IV IS the deal-very versatile...when most think of Mesa(especially young players), they think of the recto sound-the Mark series were/are the best all around amp I have ever played-does it all(comes up short of the IIC+, of course, but that is another story entirely)-Mk IV is used bycountry,JAzz,classic rock,heavy rock players all over the place...just dont think it ONLY does LOG...if I could buy a new one, I would look at a IV-read up on the SIMULCLASS section of the IV-the Stilleto is another killer..the lonestar is a texas blues special....the IV allows 6l6 AND el 34 together in class AB or class A only-the are expensive across the pond,but there seems to be a lot of mis info regarding mesa...think beyond the recto unless,of course, you like that tone
I have a triple rec and 2 Mark II C+ amps..just sold a Mk IV....I hit every tone known!!!I can dial in MArshall tones and Boogie tones..hellyeah, all I need!!play as many as you can 8)