Toksuede,
If you want to take a look at what type of quality you can get with a good 25mm lens on scanned
XP2@320ISO, go to this link where I put some photos from my recent Paris trip:
http://www.flickr.com/photos/59177039@N00/sets/72157600129345564/
There's a caveat: you willl likely take better photos with Bessa, as these have been made with a Nikon FM3A, and a retrofocus lens. If you will make it to Biogon 25/2.8 you will end right up at the top of what you possibly can obtain with a 35mm rangefinder, only the Elmarit 24 can compete with this lens ( but it costs 3 times as much...).
BTW, I buy my ZM lenses via the bay from matsuiyastore, and they arrive to Italy with no extra taxes to pay...
🙂