Since my last tournament, I've made a serious effort to put together a complete 1.d4 2.c4 repertoire.  Semkov's "Kill KID" variant of the Four Pawns Attack is my weapon of choice against both the King's Indian and the Modern Benoni.  Semkov's approach combines those two mighty openings and leads to very unstereotyped play for the opponent.  The play is more blown-open than most King's Gambits-- a far cry from Black's dark-square pawn strategy in the KID and Benoni!  I find the opening manageable to play even though I've memorized little if any of Semkov's dense analysis.  The most useful bit of practical advice is to aim to trade dark-square bishops (moves like Ne4, Bg5, Nf6+) and then attack the weakened dark squares around Black's king, as in the game below.

The publisher of Kill KID is giving away the full chapter on the Modern Benoni transposition here.  This variation is what most strong players play, so it's probably the most relevant chapter in the whole book.

Like Jonny Hector, one of my all-time chess heroes, I've been dabbling with the Veresov as a backup opening to 1.e4.  I played this cracking Veresov blitz game today with 3/0 time control against quite a good opponent.  I haven't conferred with Toga II and Stockfish yet, but the moves sure flowed nicely during the game.  One thing about the Veresov is that it transposes to an awful lot of mainline Frenches (1.e4 e6 2.d4 d5 3.Nc3), which suppose I'll now have to learn. :( (more on that later!)