Hi Scott,
A good question - but ultimately a personal decision based on how you use the floor space inside.
When we first went in search of a Jayco, we had decided we wanted the Hawk as we liked the big 'club lounge' area and the separate kitchen. Here are a few things we noticed and why we ended up buying an Eagle (then later a Swan).
* In the Eagle/Swan layout you have two seating areas. We found that when you are inside (by choice or due to weather) it was good to have two places to spread out (friends with small kids have also agreed with this). I like to sit and read the paper at the table. Other half likes to stretcch out on the lounge. We found this layout more conducive to a mix of needs.
* When preparing food, the table is immediately behind you in the Eagle/Swan and we use as extra bench space. You also have some bench space on either side of the sink. In the Hawk, you dont, and so the question is where do you put the dishes? I like dirty dishes on one side and clean on the other. Remember the sink is only small and if you are minimising your water use, you need the sink to be clear to wash.
* Depending on how many people you might accommodate, you can turn the Eagle layout into two extra (separate) beds - a good re-sale point
* I am not certain but from memory, the sink and bench in the Hawk is (or felt) lower than in the Eagle. This may have changed.
* We're not fans of getting dressed in the kitchen area and in the Hawk there isnt as much floor space at the other end away from the kitchen.
* Often, we have wanted something from the fridge while in transit and been able to reach in and open the fridge quite easily. Crawling in and around the fridge door in the Hawk seemed awkward
I am certain that others will prefer the Hawk layout for many other reasons I havent suggested, but these were the items that influenced our decision. Interestingly when we went searching for secondhand, there were very few Hawks yet many Eagles/Swans. I thought (but dont know) that this was because there are generally more of them around. We certainly see many more on the road than we do of the Hawks. But it could just be coincidence.
Hope all that info helps in some small way.
Cheers