Lawrence, welcome to the forums. As with beekeeping, guns, gardening and cooking, if you ask 10 people here, you will get 12 answers as to their opinion on any subject.
My fixed blade EDCs are either paired Kabar 1232s or paired Kabar 3/4 sized "shorty" Kabars, the 5-1/" versions you mentioned. One, they are legal for public carry in Texas and two, I like them. You can do virtually everything with them you need to do on a day-to-day basis.
I routinely carry the BK2, BK7, BK9 and full-size 1219C2/MK2 Kabars when working around the farm. I have used all of them for standard cutting, "emergency" machete use, digging, root cutting, batoning, package opening and rattlesnake decapitations. They all worked admirably in each of those situations.
With respect to the weight issue, I have found that the more you carry them and use them, the less the weight actually matters. I'm short, only 5'6" and the only problem I have with any of them with respect to overall length (in sheaths) - the longer sheaths (with the 7,9,1217) is they get in the way a little when working with the post hole digging auger on the tractor and I have to turn around on the tractor seat to operate the controls.
Specifically, with regards to the weight issue,
BK2 (current) 13.34 ounces
BK7 13.6 ounces
BK9 16.8 ounces
Kabar 1217 (USMC 1219C2 repro version) 11.2 ounces
BK10 12 ounces
BK12 12.8 - 13.2 ounces
The original Blackjack BK2 and Camillus BK2 versions were 14.7 ounces and the Gen 1 Kabar was 14.6 ounces.
IMO, and I'm sure someone will bang on me for it, but anyone complaining about the weight of the 2, compared to anything other than the 9 or something like the Western W49 or one of the larger Ontario Sp series knives, is just looking for something to complain about. The weight differential between the 2 and any other knife is like the weight of 1 Fiber-One bar.