> Then I stumbled across a landscape photographer that said to let the printer drive.
That's exactly what I found recently after getting my new Epson R3000 printer. Because it was a new printer, I experimented with different settings, but initially always set color profiles in Aperture. It was close, but never spot on. Things snapped into place after I switched to letting printer manage color.
I know many of you here might be appalled to hear this, but I use Epson Color Control rather than using ColorSync in the Color Matching tab in the print dialog. Although there's not much adjustment needed in this setting, I can easily fine tune the color or brightness of the print using the Advanced Color Settings tab under Printer Settings.