The only plus youll get from an A1200 vs. an A4000 is that getting a 1200 on the internets is cheaper with a wifi card. I've spotted compatible cards for 10-20$ on ebay before. Theyre just PCMCIA wifi cards.
4000's need a zorro card that costs a shitload more in comparison.
also like Tone said, the A1200 is a wedgeboard, so if you have no room for a clunkerthunk desktop or tower, that will be your better bet.
