Going pedalroute or rackmount? You'll want delay, phaser, and flanger in the FX loop, IMO. Delay is a must in an FX loop, as infront of the amp it will just get muddy as hell; think of it as playing 5-6 guitars into the same amp. LOL
This is almost about your other thread, too, but I honestly think that in your situation, the 5150, XXX, JSX, Powerball, Fireball, Screamer, and Single Rectifier would all work out wonderfully, and all of those have FX loops.