All of them? Amen to that brother. However, if you don't want to do that, the one thing you have to get is the Complete Savoy and Dial (the 8 disc set), plus the three disc Live Performances on Savoy. Bird's rendition of White Christmas is worth the whole set. Another essential is the Verve. If you don't want the Complete set (also 8 cds I think), Verve did a master set of about 3 or 4 cds).
The Jay McShann stuff is also great. The Upttown concert with Diz is also very good.