Magnepan 1.6 speakers


I am currently using a cambridge audio 840w amp. My question is has anyone gone from a two channel amp to monoblocks with this speaker ? Was there a huge improvement ? Is it worth the extra money to do this ?
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I expect at 200 watts into 4 0hms that the cambridge is sufficient for jazz and vocals but underpowered for large orchestral music. My suggestions for 1.6 magnepans from less expensive to more expensive are: Luxman R117 receiver ($300 used), Classe CAP 151 integrated ($900 used), innersound esl 300 mark2 ($1200-1500 used), Classe CAM350 monoblocks ($3,600 used..overkill). I'd go with innersound and add a tube preamp (I use a lector zoe) but the luxman R117 is surprisingly good and a no brainer for less than the price of good cables.
I had the best experience with my 1.6's with a Levinson 335. They need a lot of current and high damping factors to control those panels. No offense but the Cambridge is just not up to the challenge...
The cambridge stays. No need to defend it . I will be using it for many years to come.It is a high current amp. The question is about the advantages of adding a second amp, Regardless of what brand.