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I have 2 Halcyons and one Sea Elite. I started with Sea Elite but had to go to Halcyons for my next 2 sets of doubles (one new, one previously had a Sherwood manifold which pooped the bed during a fill) when the Sea Elite went backordered (months ago).
The Halcyon is a beefier manifold than the Sea Elite but performance is about the same for both, excellent.
I heard also that the DiveRite is a basically a Sea Elite with garbage knobs, not positive it's truth though.
Last time I talked to Divers supply they said the Sea Elites were in transit from factory so you might recheck with them just before you order.
My personal recommendation is to go with the Halcyon if you can handle the price.
Tom
i think the older sea elites also came with crappy knobs at one point. the dive rite manifold should have dive rite either stamped or etched on the valves iirc
not really a big deal as they perform the same