I use the ESEE 4 to gut out deer. Works like a champ! You can get away with using the 3 but I personally prefer the extra length and width of the 4 especially if you don't split the breast bone. Reaching in and cutting the wind pipe on a large deer, you'll be thankful for the extra length. Plus, if you split the pelvic bone, that 4 will do a better job.
The 3 is great for birds and squirrels and for skinning out deer.
Although I haven't used the Laser Strike on a deer, I can see the spear point being very advantageous.
The BHK Large Work Horse looks pretty good to me... Sheila, do you sell these?
I love my buck knife. My father got it for me when i started deer hunting at the age of 13, he has an identical knife from 20 plus years ago.