Jake ref your first post I deleted it, if you want to deal here then you have to make the grade and that takes time and effort, not to mention trust on both sides and that has to be earned, any post that looks like it may be underhand dealing will be deleted immediately
Both would be reliable and both would not look gen with the case back off as neither are the original omega movement ( although it is based on the 2892)
Have a read here if you want to know about how good a 2892 can be
http://www.chronometrie.com/eta2892/eta2892.html
That one that came out is not an eta or any clone of an eta it is a variant of the Asian 21 j, so looks like you are slagging the Selitas for no reason
And the close op pics of the movement look good too, nice anglage on the corners of all the plates, the pearlage looks a bit rough compared to quality Swiss but that could also be caused by the plating process,
The power reserve is great if it is 72 hours
Just a shame that the p3000 is such a flat boring movement but still well done !
Any 6.9.12 7750 will fit, you just need to get a new or serviced one, I have two sat in my spares box, a top grade longiens with full pearlage and a more standard Hamilton one if you are in the eu