Is it me, or does it seems like this DC vs MKIII has been coming up a lot lately? In any event, yeah, both will get you lots of great cleans, and thick/saturated Lead tone. I can't tell you which I like better since I love both for different reasons, but suffice it to say that both have earned "keeper" status with me if that says anything at all. So let me try and summarize for you:
DC5:
- Great cleans, warm and round. Always seems to have a touch of hair around the edges ...great if that's what you want, and really responds well to pick attack with more "fur" or "cleans up" depending on how you play. Nice.
- Lead channel is thick and smooth w/ a solid bottom, warm mids, and smooth top. The GEQ gives you a huge tonal palatte from which to shape.
- Overall, great tone and very versatile: the two discretely separate knobs/channel really make it easy to find your sound and has allowed me over the past many years to continually shape and reshape my tone ...not to mention has never let me down once when played out. And the standard widebody combo cab sounds better than the smaller cab of the Marks, IMHO.
MKIII:
Whether you get Simul or whatever stripe is up to you, but I'd say *definitely* get one with a GEQ. W/o it you are left with sharing the same tone stack with the R1 and Lead channels ...this really limits your ability to shape your respective channel tones. With the GEQ, you can assign it to just the Lead channel and that becomes your "OD channel's" tone stack ...THIS is where you can get really expressive.
- cleans are bigger than the DC5, period. Huge and tight bottom, sparkly top, and can remain spanky clean even loud loud loud. The DC5 always seems to have that bit of "tweed", and is more pronounced as you raise the volume. Also, the III has a brighter, more "chime-y" top end in this channel. Really a beautiful tonal foundation here.
- OD is thick, saturated, and tonally rich, like the DC. But I think has a wider "range" than the DC. The MKIII can cop that "less saturated vintage-y" OD of classic rock better than the DC's more "modern voice," which does ok, but is decidedly a more modern timbre. There is also a certain "rudeness" and aggression to the OD that simply smaks you ...in the best way possible. The DC's OD is smooth; the III is that but adds a certain "edge" that's just less polite
- Dialing in heavier saturation yields a bit more indiv note definition than the DC5. Break out the slegehammer for a more "metal tone" and the girth of the bottom here really is thick, rich, and addictive ...strange considering I am not a metal guy, but man does it sound great on that occasional foray into the dark side.
- I hated R2 at first ...then found that with some judicious tube swaps and lots of time learning how to tweak her, I now absolutely love the R2! More mids and works awesome in a band mix, the R2 really shines (for me) with the gain lower and my using it like a mild crunch channel ...it's a bit of a stretch from their marketing department to call it "Marshall-esque" but yes, this is definitely a more "british" voice than american.
Sorry for the verbose reply, but heck, it's a late saturday evening so I'm just ambling on the keyboard. Like I had said, I love both, with the DC5 as my #1 play-out amp ...maybe just because its a combo.
But the MKIII has that certain something that is undeniably hot, rich, and tasty. Hope this helps you a bit
Edward