BMC bikes - Swiss, very high-end, extremely expensive

Might get one.

Known for problems with the seat post not staying tight and slipping. 

As stated above if you have BMC money get a Colnago instead. 

Posh old age men wearing lyrca 

Have you considered getting into better shape?

Very difficult post 45 but you can lose timber and just become better 

Love the aesthetics of BMC. When team sky were in their prime this is what they should have been riding. Pinarello have too much flair.