Same here using a Blichmann BrewEasy K-RIMS, 5gal. Since the Mash tun is on top of the boil kettle only 1 pump is needed. I haven't needed rice hulls yet.
I have tried both rims tube and k-rims on mine as well as using a herms running through my plate chiller. I have two 20 gallon Blichman G2 kettles and two riptides. Mostly I’ll use the k-rims because I like to do15 gallon batches. Usually my volumes at mash will exceed 20 gallons and the k-rims allows me to divide up the water between the two kettles. Normally I will leave just enough water in the boil kettle to cover the element. The herms setup is nice on smaller batches because I don’t have to worry about using an auto sparge. I use a bag in the mash tun no matter which process I use.