Okay, now there are three threads, Completism, American music, and why there are two (now three) threads.
On completism. If you think YOU aspire to completism, you are no match for this fellow, whose web site I stumbled on some years ago:
http://www.geocities.com/Vienna/Strasse ... eeded.html
He owns 154 versions of Rachmaninov's 3rd piano concerto. There's a link to reviews of many of them.
Here's a bar graph of his CD purchase activity:
http://www.geocities.com/Vienna/Strasse ... stics.html
Photos of his collection - you have to see this to believe it:
http://www.geocities.com/Vienna/Strasse ... y_cds.html
And for the ultimate completist in collecting CDs, he has a few suggestions. Here is a quote from the site:
If you are even crazier than I am, you can also try a few more approaches, including buying at least one CD of each label, buying all CDs of a particular label, and buying all versions of a particular piece (I am actually doing that for Rachmaninoff's 3rd Piano Concerto and all recorded sets of Beethoven's piano sonatas.[Elsewhere, he indicates he has 40 sets!! -- slofstra]). A more advanced collector might try something even more absurd, like buying 500 copies of the same CD and covering the walls of his/her study room with these CDs, i.e. using the CDs like a wallpaper. Buying all CDs with catalog numbers that end with the digit "3" is another approach. Buying all CDs with attractive women on the cover is something I have been doing. The most advanced collector will just go ahead and buy one or more copies of each CD ever released, including out-of-print ones. This is VERY difficult.
One copy of every CD ever released; there's aspiration for you!
Now, I tend to keep my compulsion for collecting things in check, and also a little close to my chest. (i.e. I have 10 complete sets of Jello airplane wheels - a long story). You have to admire this fellow's unabashed enthusiasm for buying CDs which is probably bordering on compulsive.