Like I wrote elsewhere the '98 has in recent years morphed into a very pretty wine though initially I wasn't so keen on it.
From your list I would buy some 2002
for long term storage (both are awkward now and don't really open up even with extended exposure to air). The problem with Musar is that it tends to age at a glacial pace and really old vintages tend to be very expensive. One that is slightly less expensive because it is commonly thought of as a pretty bad year for Musar is the 1982. It's much better than its reputation suggests and will give you a pretty good view of what Musar is like when fully mature.
From trying now from your list I would try the 2004
from a half. I had that about half a year ago and it was open - though obviously young. Give it 2h of air and it should be great! But remember that young Musar, before it closes down, can be a bit of a brute so don't expect anything delicate and have something hearty to eat with it!2001
was a bit closed still and needed a day to open up but it is a good (though not great) year for Musar, in a relatively hot year style. 2000
I haven't had in a while but it was also a bit lighter style so I expect it should have woken up from its slumber so trying a half might be fun.
And that still leaves the 1997
on your list: I loved the wine when it was released. It was wild and funky and perhaps the most stereotypical Musar (in having wild amounts of VA and funk). It was a challenging wine. Unfortunately when I've tasted it since, it's always been weird and sometimes even unpleasant. I hope its just a phase (it probably is, Musars at age 20 always seem to have left puberty behind!
). But if you're new to Musar, perhaps best not to gamble on this one since there are safer bets on your list.
And a wild generalization to end with: Musar on release and for a couple years after can be delightful in a brutish kind of way; but then it usually closes down hard for about a decade. So drink on release or after they are 15-18yo.
I don't drink wine because of religious reasons ... only for other reasons.