+1Tone Boost is my favorite. Not sure that it's based off of anything specific, but it's awesome. Works great after the drives as a solo boost, but I love it going into drives to give it some more gain.
Decrease your noise floor by replacing your included iStomp power supply and using a 1Spot. You'll notice the difference more with Dist/OD verses delays and cleaner effects, but there is still an improvement.