Keepp the 2000 mate
there is little point "upgrading"
hell iv got a 500, for what I do with it its perfect.
Iv had a 1200, but I found myself trying to "botch" it up constantly.
getting this and that trying to "fix" this and that to make it more modern when really its all completely pointless.
Infact, apart from AGA there is really nothing of an upgrade.
AGA is pretty crud, its slow, and you can do 256 colors with OCS.
The IDE slot is ok, but its not really needed.