Agreed and I also have owned both.
Best shot at getting the JCM 800 tones with out breaking the bank is to find a 1990's JCM 900 MK III Dual Master Volume. This is NOT the same amp as a JCM 900 Dual Reverb.
Because the Dual Reverb has a bad rep the Dual Masters get ignored and are IMO one of the best sounding Marshalls out there. They are also dirt cheap if you can find one used. I own a 2501 50 watter myself.