Well I can say this, old Vintage, Heritage, whatever you like to call them speakers, and especially Klipsch horns can be "Refined" quite a bit for the money. As you know already doing the Crites upgrades are good with modern crossover parts.
Nothing is perfect, however there is always substantial gains to be had in cabinet acoustics etc... But there is no really good answers to getting exactly "The best".
As for the full range designs, Honestly a closer cousin to the Klipsch "Party" capabilities is probably something in the range of the BIG Zu Audio Definitions, or similar.
But you would be stepping up considerably in cost, and having active Subs in them to kick in that bottom end most full range drivers will lack on straight passive designs.
This is not my suggestion, as Zu's are not perfect either, but simply an illustration of the type of acoustic similarities for what an end result will be.
By the way there are ways to refine big horns, and party speakers
One is correct finesse available with a good tube amp as you already have in the Decware so your probably close to where you want to be.
The better question is do you think your missing something?
If so take advantage of borrowing, or auditioning some type of other speaker, and if your budget allows, or you just want to hear a full range driver setup that's comparable Zu I know does do a 60 day money back.
I am not sure if Omegas can be returned, but look into it and give them a shot to see what is working, and what is not.
