What makes you think the PM11S2 will not be able to drive them?
What other requirements do you have in an amp?
Does it need to have an inbuilt DAC, phono stage or headphone section?
I will certainly try the Marantz first (it was very good with MA Gold 200 some time ago, that's why I'm interested in MA speakers, and particularly in PL100 due to the room limitations). Phono is not required (no TT), headphone section not a deal breaker. The same goes for the DAC. My preference is for a separate DAC/streamer unit, otherwise, for the sake of convenience, I would consider something lika Naim Uniti Nova (and then add matching speakers).
Re. Marantz, I would also like to change to a faster, tighter sound, with better imaging (room limitations, speakers have to placed on a shorter side of the room). I have Martin Logan Electromotion ELS and they are not particularly good pairing in my present room (change of room seriously impaired the sound).
Should I decide to keep the speakers and sell the amp, there is a better alternative to Marantz (I have auditioned MLs with Naim Supernait 3, also with Hegel 390; I preferred Naim, both better than the Marantz). Still have to arrange a home demo, but I suspect it will not be stellar ....
I have not auditioned the MA 100PLII yet, but they seem to check many boxes for me (very good reviews, size and price ...). Normally, MA and Marantz should be good pairing, but I would like to get advice from people who got good results with these speakers and other amps, just to shorten my search and auditioning

Thxs,
postup