Re: Marshall JCM2000 TSL100??
The first thing that comes to my mind about TSL amps is all the reliability issues that folks reported around. I did not have one but a bunch of friends did. Poor souls.
DSL amps were okay from that era. It's a matter of taste / preferences but e-bay may cough up some old trusty JCM900-ish amps for even less than a TSL.
Other than that, a JVM is a great asset. If you have the money, don't cheap it out.