All the different models ... what are they all like?

Hi there!

The photo of the M900 being wheelied on the cover of a 1992 Bike Magazine was what got me off my armchair to get a bike license. It's a bike I always wanted.

However when it was time to buy a bike, I went for my other dream bike. The "oh no .. I have dopped the fecking thing again" BMW GS. (Just to note .. I got one of these BEFORE LWR).

Now that I have done a few trips abroad, I am looking for something to pose down the Kings Road

I see there are quite a few for sale in the FS section. I just wanted to ask what the riding experience is between the models. I was planning to go for a simple M6xx but was told that having owned a 1200, it would be too underpowered.

So what are these ones like? Especially riding around town
S4
S4R
S2R 800
S2R 1000
other suggestions?

Any advice would be much appreciated!