This is what I have narrowed it down to. Any of these should meet my needs.

Sequence ReeFlo Dart Pump, 3600 GPH
$228.99

Dolphin 2800S Amp Master S-Series External Pump
$217.90

Gen-X PCX70HP (High Pressure) External Water Pump
$195.00

Iwaki WMD40RLXT Water Pump - (American Motor)
$175.00

Pan World 200PS Magnetic Water Pump
$249.90