A quick Google search on your TV indicates it could pull both all three models. The 2008 Jeep Grand Cherokee 3.0-liter Diesel can pull up to 7,400 lbs max - you should double check that! (The Salem 26TBUD might be a stretch if fully loaded but you could pull the Dry Hitch weight easy)
Have you considered the Forest River Wildwood series instead of the Forest River Salem Series?
They are sister trailers made be the same manufacture (Forest River) just different decals and interior finishes (fabric and such).
The reason I ask is RVWholesalers in Ohio carries the Wildwood line and the have excellent prices. When we were looking they beat the best Canadian price we could find by $3,500.
We are driving across the border to pick up our new trailer over the March break (we are in the Toronto area). They cater to the Canadian buyer and will provide virtually everything you need to get back into Canada (except a passport). For an additional price they will deliver it to your door in London.