my ideal A1 system would be:
At least 800MHz G4
512Mb Ram
80Gb Hard Drive
Best ATI GFX card that OS4 supports
CD-RW drive (maybe DVD-RW if and software turns up for one!)
Best Creative Sound card that OS4 supports (pref 5.1+)
If I think of anything else I'll add it!
Not that I can get this system till end of the year, but what the hay, fun to imagine! :-)