I also have the SL65, it's an excellent receiver!
I'm in the Midlands, and get all Astra2, all Astra1, and much Hotbird, on a tiny Sky minidish. I can also get a few channels on other sats, eg Hispa etc, but it's not really worth doing with my size dish, so I just stick to "the big three".
However, up where you are, you will need a bigger dish, certainly 60cm at least, and 80cm would be better!
The SL65 will "tune into" any DVB-s1 (ie, not new HD channels!) signal, but show no picture on encrypted feeds (although, sometimes, you'll still get the epg/teletext). So, just go for free to air only, there's many of them! If you scan for FTA on the "big 3" sats alone you'll get about 500 tv channles (and loads more radio channles, but I only scan for tv!). Transponders change frequently, so it's worth doing an update scan on each sat once a week, the new channels just get added to the database.
For details of what's there, you can look at
www.satcodx.com, but in any case the SL65 will just find most stuff automatically (unless a very unusual symbol rate, but there's not many).
As explained above, digital reception is all or nothing, so if you get it at all, ther picture's perfect (occasionally, if borderline, the picture may "pixillate").