I would not say the OEM R1M suspension is adaptive. When talking suspension and suspension control, the term adaptive is normally used for suspension that learns or re-calibrates from history. The R1M does not. The R1M changes the compression and rebound damping depending on the mode of the motorcycle (if it accelerates, brakes, turns or travels at constant speed).
There is really no aftemarket suspension that is comparable to the OEM R1M suspension because none of the aftermarket alternatives keep the electronic control. On the other hand, all recent Ohlins aftermarket cartridges, front forks and shock absorbers have got hardwares at a higher state of tune. The hardware found in the OEM R1M suspension is comparable to Ohlins 2011-2012 aftemarket suspension (because that is the time frame in any OEM motorcycle) and there has been development since.
Then again, it all comes down to the intended use of the motorcycle.
As an everyday commuter - get the base model or even the cheaper S model.
If you do more inspired road riding and occasional track days - get the M model. It's without doubt a better performing package and you do get some good stuff without having to invest time.
If you are a trackday junkie - hard choice. You are going to get rid of the OEM fairings and you are likely to add loads of aftermarket parts, but do you need the electronically controlled suspension...? Can you use the advantages of aftermarket suspension at a higher state of tune...?
If you are building a Superstock legal race bike - get the R1M simply because the mechanical part of the front fork (that you have to keep) seems to work slightly better than the base model. Get the race fairings, the Superstock engine / electronic kit, disable the electronic suspension control and add the cartridge kit and the shock absorber of your choice.
If you are building the ultimate Superbike - get the base model and strip the bike completely. While sending the engine away for tuning, get the front fork, shock absorber, wheels, brakes, electronics and data acquisition system you really want.
Get the M model as a collectors bike...? Forget it. This is not an italian exotica and certainly not a race bike like the R7 or any of the "R" Ducatis. This is a mass produced japanese streetbike. There was some initial talk about only five hundred samples, but I doubt it. We are talking about thousands. It came back for one more year and I would be very surprised if it's not available for 2017 too.