My previoius trailer was a 2007 17' Spirit Deluxe Casita. I just moved up to a 2013 16' Sport. The Bambi weighs about 370 pounds more dry than the egg.
I tow the AS with the same TV I had with the Casita (2010 Jeep Liberty 4X4).
Any Casita owner will tell you that you have to travel light due to the lack of outside storage. I can't tell you how much more room we feel we have with our 16 footer. We are using the exact amount of "stuff" in the AS but now we can store most of it in the rear outside storage compartment and not on the bed or floor as in the egg.
Of course yours being a 19' weighs more but has a bit more inside room than our 16 footer. Our Jeep is rated at a 5,000 pounds towing capacity; we just returned from Yosemite where we did a fair amount of mountain driving (one grade was 10%!) and felt the Jeep did almost as good as when we towed with the Casita. the MPG went down from the 15/16 we got with the Casita to 12/13 with the Bambi. I'm thinking this has more to do with the larger frontal footprint than with the additional trailer weight.
As far as towing with equalizer bars and/or a sway control. We towed with a Valley system on the egg and now use the Equalizer brand which I love since we don't have to deal with the chains and the separate bar to install. Add to that the great AS towing aspects and the Sport towed as good as with the egg.
Unless you tow a small tent trailer or other small light trailers I wouldn't tow without either one of these items.
Here is the weight specs for both trailers:
17' Casita Deluxe: dry wgt/2,480 lbs tongue wgt/365 axle max/3,500
19' AS Bambi: dry wgt/3,795 lbs tongue wgt/550 axle max/4,500
We plan on moving up to a Jeep GC with the Pentastar V6 next year; 80 more hp and more torque. With the Sport the V8 for us would be overkill.
One last comment, if you read every negative thread in both the Casita Club and AS websites you would come to the conclusion that both trailers are major pieces of crap.
Now that I have owned both I know I've experienced the two best travel trailers bar none! Sure I had a few "minor" issues with the Casita and I'm sure I'll have some with the AS but remember; these two trailers have the best resale value of any travel trailer offered in the market place, when you go to sell them you have multiple buyers, the owners of these jewels are typically the nicest people you will meet and last the unique and very cool appeal both these trailers offer.
No offense but during a trip out when was the last time an owner of a stick built box trailer got multiple requests to see the inside of their trailers or get honked at out on the road?
Good Luck in all you AS adventures.
in So Cal