I know you know...but don't want a newbie misreading my post...just yankin' the chain on teh plastic stuff, Rome was not built in a day, one stone at a time.
Do you have a 2" Y?
I'd probably leave all the rest for now..and get one of those, and stay with the 2" hose.
On the 11" 4 jet wand, with allowing a full inch of overlap, you get a solid 10" clean pass, with a 14" 5 jet you get a solid 13" pass, with a 5" differential you would in "theory" see a 30% faster cleaning rate. But i wouldn't run it head to head without the 2" Y, as it will give the extra power to fully utilize the 14" head, and let that 4007 blower do what it was made to do.