The 800 is more brighter and middy that's why I like bothI see you’ve received a ton of replies recommending the SV20C, although it doesn’t fit your criteria of under $1000 and 212. But also agree with others that a 212 combo doesnt really qualify as compact. Would actually prefer a separate head and 212 cab, but that takes you even further out a budget.
Bottom line, outside of the SV20C (or SV20H head w 212), you’ll be hard-pressed to find anything else out there that authentically replicates the sound and feel of a non-master volume plexi. Especially within the budget of under $1000.
I was thoroughly impressed and surprised at how well the SC20C, with it sgl 10” Celestion, authentically replicates “that” sound.
And don’t be put off by the shrill brightness of one on the floor at your local store. That is an easy fix between replacing the first ECC83 preamp tube and speaker choice. I’m actually very happy with the speaker that comes in the SV20C. It’s amazing how much you can fine-tune that amp simply with choice of tubes… Just like the real deal.
Your other option might be if you are lucky enough to find a used 1974X 20w 112 combo reissue. But again I’m sure even used it’ll be way over budget.
I don't see a 2x12" combo as "compact".
If you are tight on budget, maybe you can find one of these cheap:
I would go for the origin 50. Killer amp for a killer price and head first has a lot of mods available to make it even closer to a plexi. I personally think they sound great stock at a very reasonable price. Same design as the studio vintage and same components.
We agree on that, EXCEPT he wants a Plexi-Sound, not just any combo. VMs are cool amps, but are modern-rodded JTMs by design (may fit the bill, may not). The Origin as I appreciate it is a Plexi-sh sound, coming down the the dilemma of getting the more exacting tone (and paying for it) -SV, OR getting the more affordable amp (and compromising the exactness of tone) - Origin.