MJ1000 is 265 gph
MJ1200 is 295 gph (also w/out attachments to limit flow (becooling attachments limits flow to 3/8", and they are pvc cemented on).
Find a local aquatics store online, much cheaper than the 'local' guy. I got 2 for 40$USD from premiumaquatics.com (USA)
Small (reason I got it). Got a picture of one next to a ~3" diameter tupperware on page 2 of 'log of my concoction' so you can get an idea of scale. I crazyglued the impeller (moves a little (let aquar. debris pass)), gluing is supposed to reduce hum.
Also noticed during previous tests that it runs very warm, so should definately be in airflow.
This thing is encased in a hunk of epoxy?:shrug:, and the only moving part is the impeller so I think it should be okay. I hope to test my cpu loop this weekend so keep an eye out for updates and I will try to give more impressions of the MJ1200.
Oh and I have a 1250 laying around as backup, but this should be sufficient for my needs and only about 1/2 the size.