Dean, I've had much better service using a stand-alone brush-on-a-handle
along with the simple hose-and-nozzle.  Much better brushes available.  Not
quite as easy as the combo-type, but once I got used to them, I wouldn't
swap back UNLESS someone produced, as you seek, a much better combo.  HTH, s

I just started using the brush with water attachment you speak of, but
I don't hook it to water.  I just rinse and soap the car first, then
work it clean with the brush.  For the money, the bristle quality is
pretty good on these Autozone-esque brushes.  To get a better brush
(without water pipe) you may need to go through a detailing vendor.  I
haven't seen high quality units with the integral water pipe.

The brush sure beats those wool-like hand pads for not shredding on
sharp corners / trim.

Toyota MDT in MO

You can hire me to wash your beast.  $9/wash

See if you can find a source for Laitner brushes.  I have several of
theirs going on 20 years old and they work like new.
  I have also bought some at a hardware store that were good quality.