Morels are great warm components. The Seas are nice, lil on the high side, but they're great. I'd favor these above the others that you've listed. I've seen people switched from DLS sets to Seas and like them.
But as far as competition, it's more to just a set of components. Stage and tuning play important rolls as well. I've seen people competed with a set of Mid-end Hertz and win the competition nicely as well as a guy running a set of Seas Lotus front stage along and get placed as well.
I'm going to run my Morel Elates + independent Morel Mid range drivers as Active Front stage, Passive Center along with the Hertz HKS-165 rear fills. I thought about competing, but the new crib is taking priority so I'm going to set these up to enjoy them personally and competing when/if I want to.

