The Honda EM4000s or EB4000 will run your equipment but you are maxed out at that wattage, the EM5000S or EB5000 cost about 180 more.
They have a cheaper 5000 but it is not on wheels, it is more of a truck mount type. (can get to be a pain in a hurry if you are moving it around and loading and unloading it shows)
If it were me I would go with the EM5000S, it is electric start, will run both blowers with some power to spare, has 7000 watts starting power, The EB5000 is about $180 cheaper, but I am getting older and not pull starting those things when it is 30* out in the morning at a show is worth $180 to me.