If Karl's SWA vids have been removed from the Cake Store I for one would URGENTLY encourage the Baker's to put them back up... even if they are mostly up on Youtube now. I think I own almost ALL of Karl's vids and have them stored on my research laptop for quick reference. Watching them on Youtube is a PITA (because YT itself has ever increasingly become a PITA since Google bought them out).
Of course some of the material is now out of date but 90% is still spot on and relevant. His series on Sonar FX and Instruments have been an absolute doGsend for me personally as well.
I also lurves me some Eli Kransberg but honestly, as helpful as his Sonar vids are Karl's are WAAAAAY more thorough and useful. I don't think Eli is a hardcore Sonarite like Karl is. His music theory/general production vids though are great. I loved his Jazz series on G3.
Of course whenever the subject of tutorials comes up we can never forget Mr. Scott Garrigus and his Power books (and his Digifreq site). I would really like to see him shift to maybe a regular article + video effort with the new SONAR model though. Then of course there is Mr. Anderton's SOS articles which are easily searchable and my personal favorite... the old X1 Advanced vids he did which aren't really beginner's tuts but show a whole pile of cool things you can do with SONAR (most of which is still relevant).
Cheers.