1) Within the D&D family ("d20 games")
The D&D family is HUGE by now...
2) Quick(ish) learning curve from 4E
Most d20 systems are fairly complex once you dig into them, because they're derived from the rather fiddly, system mastery happy D&D 3.0. Some derivates, like Fantasy Craft, heap even more complexity on it.
My recommendation here is 13th Age - I've playtested it twice. Both times, I just put pregen characters in the player's hands. With some basic familiarity with D&D (different editions for each player), they were easily able to find their way around.
3) A decent amount of published material, in particular adventures (or easy to convert to from other forms of D&D)
This points to Pathfinder. Or a subscription to the adventure paths available here on Enworld.
4) Quick but tactically rich combat
Again, this points to 13th Age. It has inherited some of the tactical features of 4E, but is less fiddly and exact about them, which makes combats faster.
Pelgrane did talk about a second, more open playtest round for April - I'd keep an eye open for announcements.
The D&D family is HUGE by now...
2) Quick(ish) learning curve from 4E
Most d20 systems are fairly complex once you dig into them, because they're derived from the rather fiddly, system mastery happy D&D 3.0. Some derivates, like Fantasy Craft, heap even more complexity on it.
My recommendation here is 13th Age - I've playtested it twice. Both times, I just put pregen characters in the player's hands. With some basic familiarity with D&D (different editions for each player), they were easily able to find their way around.
3) A decent amount of published material, in particular adventures (or easy to convert to from other forms of D&D)
This points to Pathfinder. Or a subscription to the adventure paths available here on Enworld.
4) Quick but tactically rich combat
Again, this points to 13th Age. It has inherited some of the tactical features of 4E, but is less fiddly and exact about them, which makes combats faster.
Pelgrane did talk about a second, more open playtest round for April - I'd keep an eye open for announcements.