You know I don't have two babies, but spend so much time on the stroller boards it's easy to regurgitate what I've read.
the only grumblings that I've heard about the E3 is that you have to take off the back seat to fold. there were no complains on other child sitting in the back.
I thought there was a thread about the zooper tango twin that everyone loves since you can use a baby carseat with it as well.
but if you're looking for one that is narrow/umbrella style fold.
the marco sky has the one in the back elevated so both can see, but it's not yet available in the states, but you can probably find one on ebay.
If you're looking for a running stroller here are some other options.
this one is also not available in the US, but looks so nice - Powertwin