Each pump is lifetime warrantied and is bench tested before it's sold.[/QUOTE
Well the PTP is lifetime warrantied as well. Though not bench tested the failure rate is very low (only 2 that I'm aware of) and even CPE has had a few failures. Bench testing does not equal 100% reliability. I'm not saying CPE is crap, they are good pumps for sure. However, $300 vrs $700 is a big difference.
The only downside is the PTP has to be broken in. I didn't have any concerns or issues with this but I know some people might and I understand. But paying $400 to have it broke in is just a bit steep I would think.