Yeah, the Exped is always out of stock anyways. We have the REI version and it is ok, but we use these now:
Amazon product ASIN B07Z998YRV
They are fantastic, though a little bulky. They are at least as comfortable as our Exped and way cheaper than the Duo. Right now there is a $30 coupon on Amazon which makes them $169.
We have been using ours for about a year and a half and they have been great. We are pretty rough on our gear too. Our dog walks all over them and they get used on the ground regularly and we have not had any leaks. I initially bought one to try out thinking that I could return it if we didn't like it, but we were so impressed that we bought another one and replaced out REI doubles. So now we carry two of these. They are super insulated and amazingly comfortable. We use a small 12v air pump to inflate and deflate them.
Again, a little bulkier than the exped when rolled up, but not much and for the cost, it is totally worth it.