Any other info on the Daytona? Seems full set (minus tags and calendar — which isn’t a big deal). Needs service...ok...what’s the condition? has it been polished?
Personally, I’d do the trade. Especially given your current collection. It fits. And seems that you prefer the 5 digit references. Also the Zenith Daytona is definitely a collectible and full sets in amazing condition and just going up and will continue to $ wise.
I’ll be the voice of reason - there is NOTHING special about the LVc or BLNR - unless you “love” all of the hype. That’s it.