Congratulations on your purchase

I have had amigas before, but I too just recently got myself of an a1200 for the first time in a few years and am having a blast

Hope you get a kick out of yours too

As for software recommendations there's probably quite a few things you should know about when using a nostly default OS3.x install. Besides the productive type software and games there's also a bunch of enhancements, libs, toolkits, and so on that are definately worthwhile, if not almost essential.
In no particular order I'd recommend:
MUI (gui toolkit, used pretty heavily and needed by a lot of software)
Fblit (will use the faster "fast ram" for a lot of gfx and sound data, preserving precious chipram and speeding up the display somewhat in the process).
Ftext (similar to fblit, but deals with text)
Magic Menu 2 (not essential, but handy. Basically gives the user the ability to use pop up menus instead/as well as the standard bar at the top of the screen. Also adds a little configurability to the way menus are used)
NewIcons (an alternative icon system. Allows for up to 256 color icons and is used fairly regularly.)
Im sure there's plenty more Im missing, but Im drawing a blank at the moment

As for a mod player, Im not really a mod guy, but Hippoplayer seems pretty popular.
Edit: Ah, Khephren beat me to it
