I was trying to make the same decision. Read the reviews on the Jenn-Air, they are terrible. Jenn-Air licenses their name to a company in China that makes these. I went with the Weber E-320 and added a rotisserie. It may not be the best, but there are a million reviews and none of them are bad.
95% of everything we buy is made in China these days. Most of the grills are using the same stainless steel grade now too (in this price range) or are cheaper cast material.
I liked the even more expensive weber grill (one i didn't list) but had to keep around 6 bills. We've cooked twice on this one and its very good. Even heat (unlike my last pos) and works real good for indirect cooking. The searing section is really nice too.
I read a lot of bad reviews about all of the above, but many were comparing them to models a few hundred dollars more than these so that didn't help. The better reviews were from cheap asses that buy Sam's club grills or CharBroil shit from Home Depot like me. This is the first time I spent over 4 bills for a grill. My ultimate plan is to build a nice brick one in the yard.