I haven't heard the PS-12, but I have had the E250P sub in my home. It belonged to a friend of mine.
http://www.amazon.com/JBL-Northridge.../dp/B0000EWNW4
He picked it up on ebay for $80, and wanted me to tell him what I thought. I listened to it, and told him once he had $600, run, not walk, and get a 20-39Pci from SVS. He did, and he couldn't be happier.
He had a 15x40 basement, and hasn't even mentioned upgrading since he got his SVS. It plays loudly with low distortion, and has a more tactile feel than that JBL.
http://www.amazon.com/JBL-Northridge.../dp/B0000EWNW4
He picked it up on ebay for $80, and wanted me to tell him what I thought. I listened to it, and told him once he had $600, run, not walk, and get a 20-39Pci from SVS. He did, and he couldn't be happier.
He had a 15x40 basement, and hasn't even mentioned upgrading since he got his SVS. It plays loudly with low distortion, and has a more tactile feel than that JBL.