Re: Marshall JCM800 vs JCM2000 Series
I'm a big fan of Marshalls, and have owned all of the ones mentioned in the thread, and have tried all the ones I never owned. I won't say that certain ones are better or worse, expecially if they were designed completely different. They all suit a particular Marshall flavor perfectly....you just have to pick the one that is closest to what you want.
Plexi ZZ Top, Free, Hendrix, Page type of sound. Levant, no corner caps, small logo.
JMP Metalfront cleaner with sweeter OD than 800's...think Yngwie, Blackmore, early Aerosmith tones, most early 70's rock. Levant, no corner caps, small logo
Late 70's Mastervolumes. black levant front panel, big logo, plastic cornercaps. Think Indie Rock, Punk, Garage Rock. Ramones and Monster Magnet.
JCM 800. Think Kiss, Motley, Judas Priest, Ozzy, etc 80's metal that's not superhighgain. black cloth front, big logo, corner caps.
87 Silver Jubilee, 88 Black Jubilee, Slash Model. Cloth front, corner caps, channel switching between clean JCM 800 tone and super hot rodded 800 tone. It's basically an 800 with a diode clipping Tube Screamer circuit built into it's gain stage. Tonally, it'll give you everything between Slash's tone and Zakk Wylde's tone. Enough gain for liquid sustain and tight palm muted chunk. Sounds sweeter and slightly more vintage than DSL's, but has the same kind of gain. The prices for all these models is climbing quickly, so buy soon!
JCM 900. Their second stab at putting 6L6's in an amp, but without the tone the JTM 45's had.

They added reverb to both channels. Kind of a cold sterile sounding tube amp with crappy reverb. Still has the JCM 800 sound, but doesn't sound quite as good on either channel. The EL-34 versions are better, but still not as good as most Marshalls. Tubed and biased right, they can sound decent, but I'd only buy at rock bottom prices for these......and that's about all they fetch.
DSL. The Drake tranny versions (early DSL's) were the better ones, although the Axiom tranny ones are pretty good too. These are the most versatile 2 channel Marshalls to date, and cover all the bases very well. Well worth buying for highgain Marshall fans. If you want a highgain tube Marshall, the DSL and Jubilee are the ones to get.
TSL. A few too many bells and whistles made them sound a bit lesser than DSL's.
They have 3 channels, but the tone is just......OK. Known to have channel switching problems that need warrantee service, from what I've heard from owners. Still, a good versatile 3 ch. all tube amp, so it's worth buying used at a decent price.
I won't even mention solid state Marshalls. Different strokes for different folks. :13: