Hi there, congrats on having an A4000!
First thing i would upgrade would be your processorcard, get rid of
the 040 and get a 060 (it's soooooo much faster) and if you are lucky
enough (or just rich) get a PPC card like i did, the Cyberstorm PPC
card makes your Amiga a lot more fun and modern, second get a gfx
card, once you have one you never want to do without it, get a
cybervision ppc or a mediator+voodoo 3/4/5 (shogo really runs nice on
my voodoo 3 3000@1024*768*16 :-D )
Don't go for a cybervision 64 or CV643D, there slow and you will
create a bottleneck in your system.
Also do not forget memory, get 128
MB it will be more then enough, and let's not forget get a SCSI HD (i
bought my seagate 18 GB UW3 for 50 euro's second hand :-D ) get
yourself a networking card (ardiadne,x-surf or a cheapo PCI one if you
have mediator) Well, you have a killer setup now and enjoy it, pc
friends still look envy at my system coz it still outpreforms there pc
on a lot of points hehehe.
and let's no forget check your buster
revision if it says rev 11 your all set!
Grz,