Don't confuse ROM with RAM though
WMP doesn't seem very big as a program itself, it's only when running, and loaded with content that the memory issue shows- seems as if it loads too much of a file into memory at once, ratehr than paging as needed.
TCPMP is, I suppose, aimed at a differnt market, as PT is only audio rather than video. Playlist management in PT is leagues ahead though, as is sound quality.