Welcome back there guy.
A few things, some A1200's can support 2 drives, but you get a good
chance of blowing the mobo. I'd recommend Eyetech's adaptor, which'll
give you 4 drives. Also, a standard PC tower hack can be done, but
that would be a major pain. I'd recommend Elbox's towers myself.
I'd also recommend looking into a Phase5 BlizzardPPC card, so you can
migrate to one of the PowerPC'd AmigaOS replacements, such as MorphOS
or AmigaOS 4.0. With the BlizzardPPC you can also upgrade the gfx to
a nice 3D chipset from 3Dlabs.
But hey, that's just me.