RFisher said:
Having run stuff designed for classic D&D with C&C: Using the Mystara stuff with C&C instead of the RC is almost trivial.
...
Yes, using your "Known World" material with C&C should be a breeze! In fact, I am interested in running a Norse campaign using the "Northern Reaches" GAZ with C&C once I get the chance.
I would recommend either the
RC or
C&C.
RC is nice because it includes everything you need in a single hardback book (convenient and complete, and more durable than the soft-bound B/X/C/M booklets). As RFisher mentioned, it also includes all the optional rules for D&D that were introduced through the years. I think it is nice to have them all in one place (I personally like the "death's door" and "unlimited demi-human progression" options).
If you own all the Gazeteers and don't mind flipping through many books to find information, then the M/C B/X sets would certainly suffice (and the art in M/C is the best IMO, but I am an unrepentant Erol Otus and Jeff Dee fan).
Don't get the Holmes Basic Set. Contrary to what some have suggested, it does differ in some noteworthy ways from the Moldvay and Mentzer versions (e.g. more complex alignment system, different spell descriptions, etc.). The Moldvay Expert rules includes a "conversion" section, but really you may as well just not get it at all and save yourself the trouble.
As much as I love the RC, though, I think you should take a look at the
C&C PHB when it comes out. Like the RC, C&C PHB is complete (all the rules you need to play the game in one book), and even shorter than the RC. In fact, it really is a "rules lite" system (in contrast I would say that the RC is "rules medium" and 3.x D&D "rules heavy; it is even "rules liter" than M/C B/X rules).
And unlike RC D&D, C&C will be "in print" and thus actively supported. It uses the single d20 mechanism to resolve all tasks.
But either RC D&D or C&C makes for a great, fast-paced game IMO.
