Ugh... yeah, the build it yourself route is obviously the best choice, but there's just soooo much junk to sort through. Wanted to avoid it, but may end up going that way. I guess though, it would benefit me to organise according to iTunes so that if I later decided to just click the "organize library" preference, it wouldn't jack up all my progress?

Yeah, anything of which you've heard horror stories, I don't wanna mess with that stuff either.

Cute story: my new computer auto spell corrects organize to organise. Booya Eng Land!!!

Also,

I know there have been discussions about which programs are best for playing music at home, but I also strongly suggest using foobar2000 if you want to read/fix mass tags while you're building your new library. It goes MUCH faster than itunes. Like changing The Beatles to Beatles.

If you have more complex problems (like missing song titles tags), I suggest Tag & Rename.

I think the main horror story with Music Brainz is that it's really fucking complex, and people don't do shit like read directions, so I've seen postings that are like, "I tried to use it on this section, and it pulled everything from everywhere and mixed it together".

People are stupid.

Pretty sure itunes will search whatever drive your music is on and consolidate it into a new location for you. Or it will clean all the folders up and put them into one spot at the same drive. It SHOULD keep the tags you've already put on each digital file.