I suspect that you will probably find them emitting smoke of either the metric or imperial variety depending on age and it's terribly difficult to put back in so I woul leave them where doing the job they were designed for.

Apart from the two brands named above I'll throw Eminence into the mix as well.

Different magnet types and magnet size plus cone type have a massive impact on the final sound.

Decide on who's live sound you would like to try to emulate and then find out what type of amp and speakers they use, studio sound is fairly useless because they will be using various amp sizes and types on different tracks or even on the same track.