Okay, since you have the Izula I'd say you have fine motor skill tasks(skinning dinner, surgery, fish hook building, etc...) covered with that.
I own multiple ESEE's(including a 6/ Izula 2) and a Becker BK9. I'm a huge fan of ESEE but I'd definitely say get the BK9 over the Junglas if you're set on a big chopper. The handle is just so much better with the Becker, especially with micarta or modded with tennis racket grip tape. It's also gonna be more versatile than the Junglas.
Now if you were just taking one blade out into the field I'd recommend the ESEE 6 as the choil allows you to choke up more and skin an animal better. Also, if you need to chop bigger things, batoning is a much more energy efficient way of getting the job done IMO. The ESEE 6 will baton just fine.
So, bottom line, if you're gonna be taking the Izula with you get a Becker BK9(or Junglas I suppose). If you're not gonna take the Izula into the field then get the ESEE 6.
Also, the only knife task I don't really like doing with a big blade is skinning(if you haven't noticed lol). One way to solve this problem is to buy a scalpel and blades for under $10 and keep them in the sheath with the big chopper. The blades are in protective little packs and are very slim and light, as is the scalpel. There is not a better tool for skinning than a scalpel IMHO. Also, the blades are sterile so they work great for small surgeries like getting out splinters and such. BTW if you cut down a scalpel handle it will fit in an Altoids tin with 10 or more blades and a ton of room to spare.