^^ Well if you are not too particular about the SD805, then there are several Phablet options that cost less. LG G3, Oppo Find 7, One Plus One if you are fine with 5.5" display. Then there's Vibe Z2 Pro which is capable of running a stock android experience out of the box.
Pretty big difference between a 5.5" screen and a 6" screen IMO. Can't comment on the Lenovo phone because I've never used one and I can't find a good review of it. However, it's still an SD 801 and while the difference maybe negligible, the Nexus 6 sports an SD 805 which is absolutely cutting edge at this point in time. The Vibe may also run stock Android but how are Lenovo with updates? When is Lollipop expected?
Sure there are a few VFM phablets out there but if you want the absolute best specs money can buy, there's only the Nexus 6 and Note 4. Maybe I should have said premium phablets in my original post.