I just picked up a lightly used DR650SE here in Canada, my first such bike after years of owning and running older BMW GS's (Airheads, not the modern kind).

I was caught in a similar decision, as I really like the F800GS. However, after taking a closer look I have concluded that it is just too big and heavy for me - off road anyway.

As to the DR650, I have been doing a lot of research into modifying this bike for RTW. If you haven't already, check out this thread on the Suzuki forum (last few pages)
http://www.horizonsunlimited.com/hub...-haul-23847-13

With a relatively few and simple modifications (air box, muffler, maybe a different carburetor, upgraded seat, tank, springs) , the DR can be made to run much stronger and will be significantly lighter and better 'off road' then a F800 every will be. I am finding that the modifications and parts are both plentiful and cheap compared to BMW stuff. This bike has been largely unchanged for 16 years now, so lots of support.

Power is adequate for solo, the bike is light and small (feels like a 250cc bike to me coming off the G/S), and the seat is low. I believe most people are reporting between 15 and 20 km per liter, which is not exceptional, but not bad either. A few extra jets and you are good for any elevation. They are pretty cheap new in the US ($5000 right now). What about starting here with new bikes rather then trying to find good used ones in Germany?

In any case, I am just learning about this model, but from my current experience I would give that plan (two DR's) a big thumbs up