I think if you've got other markers the flatline is the way to go.
I think pressure wise the SHP and flatline would both work, but as I recall the flatline's output pressure is adjustable so you can lower your psi when using your a-5 or other markers which probably don't want pressure over 800 psi going into them.
I feel you on the ULT, I bought mine thinking it would be the bees knees, but I much prefer the standard RT on/off assembly.
"Originally posted by Bronk0
Everyone put something in your sig about it...
like PORN THREAD 10/24/04: I was there. "