Forgive me if it seems like I'm badgering, but I haven't actually seen anything that you are looking for in a bike other than to do the Iron Curtain route with 4 panniers.
A bike is for life - not just one trip, so again, I'd focus on having a really good think about what else you might fancy doing.
Going online and looking at what's available without a reference point? That way lies madness!
As for the touring/bikepacking debate? Give me 10 people and I'll give you 20 definitions!
On the bikepacking theme there's a great write up
here on a Slovenian trip. That bike can be set up for panniers too, if I remember correctly.
You haven't mentioned budget either and I've no idea what gear you have, but remember to put some money aside for equipping the bike and yourself, if necessary.
There are lots of previous threads about touring bikes, equipment etc. Have a look through or use the search function.
On a housekeeping note, if the Topstone is no longer interesting maybe ask the mods to change the title or start a new thread - you'll probably attract more replies.
Good luck!
