Does anyone have experience with either the Octopus HB 800s or the BH 2000 that could chime in? I'm looking to upgrade to one of these and am trying to decide between the two. Is the 800S worth the extra $70? The upward facing drain on the 2000 looks like it might be rather noisy, is that the case? Is there anything else I should know (prone to overflow, noisy, etc)?