I was lucky in that I got into Elvis Costello in 2001, which is RIGHT when the reissues started coming out. So I bought Get Happy by itself, but got the rest in the Rhino form. Gonna be hard to top those.
But to keep this from getting further off topic, I'd hope that Music Group would also have Pangaea in its entirety. Also that they got the rights to a White Stripes song, but could only afford Little Room.