The best Amiga to modernize is A1200.The most expandable and is the amiga that have more expansions on the market (even new ones).You can even put zorro or pci slots and have even more expansion options
My ideal setup:
Amiga 1200 desktop
BlizzadPPC and blizzardvision (if you can get them)
Wireless pcmcia card
Subway USB contoler for clockport
Indivision AGA internal flickerfixer
