Samsung unveiled two ‘premium' flagship devices - Note5 and S6 Edge+ during their Unpacked event a few week back.
Just in case the Samsung made phablets doesn't go by your ‘premium' definition then there's a potential workaround. Karalux Store, a specialist in Gold Plating phones has started selling gold plated variants of the duo. The company will be replacing the metal parts of the device with gold plates which further boast of an extra layer of protection.
Karalux has previously gold plating to the Galaxy S6, S6 Edge and Note 4. Hence you can pretty well understand that they are quite adept with their work.
Nevertheless you will be required to shell out a few to get your device gold plated. The gold plating process for the two phablets costs around $355 / €312. Add to that the retail prices of the two devices to get an idea of the final sum.
For example the Galaxy Note5 with 32GB of internal storage can be purchased for $768 / €674, which makes the golden plated version of the phablet worth $1,123 / €987 - not a negligible sum by far.