I would get an a1200 with a HD installed if i was you. The stock a1200 runs a much newer and better revision of the AmigaOS and also have more ram, faster cpu and better gfx chip.
With a hd and whdload, you can install nearly all classic games onto a hd. This will save you the hassle of swapping floppies and will also make the games load much faster. The AmigaOS3.x is also much better than the 1.2-1.3 you get with an a500.
The a4000 could maybe be even a better choice, since it comes in case that makes it easier to expand with a cdrom drive and so on.. The drawback is that it is probably more expensive than the a1200.