While I do love my Monster, it's not my favorite all rounder...big and bulky and takes a while to pump. However if there's a QFD around this thing is pretty unstoppable since it can be recharged and refueled very quickly.
My two favorite all rounders are my XP 110 and my Flash Flood...sadly both of them are out of commission with problems.

The XP110 is light, easy to carry, solidly built, has good power for its size, and doesn't take many pumps to fully charge...also love the pressure gauge.
The Flash Flood is one of the most balanced guns I've used...it's an excellent design that has great weight distribution. Plus the Flash Flood nozzle is a great close range burst weapon.
I hope I can fix both of them.