I'll be interested to see what you decide on. The reason I've stuck with exped is that I haven't found anything that is supportive/thick enough for me to sleep on, warm enough and packs to a size that I can cycle camp with. The chair kit is also important as I often sleep sitting up or partially sitting, so I would have to be very convinced by any alternative to lose that.
It's not about weight DALE. It's about comfort x warmth x packsize. I find the fail rate (4 in 12 years, one twice, despite us sharing the DLX at one point and me regularly using the chair kit which puts them under extra stress) is worth it because I haven't seen an alternative that has all three elements that I need. I might consider finding an alternative if I was going on a long tour, but as I sadly have to work, I am never likely to be away for more than 2 weeks at a time.