Breece: 
Thanks for your valuable input.My original qestion was more along the lines of the value add to the block, if any, of the DA rather than the value of a draftsman (e.g abc) vs a quality Architect and town planner.

Quickchick:
Thanks for your thoughts and interesting experience,certainly food for thought.

Many options,every road has plenty of twists and turns…depends on who you talk to!