Pinarello + Ultegra Di2?

boothie Posts: 2
edited April 2013 in Road buying advice
Looking to pull the trigger on a $3k-4k bike. Looking to buy
-Pinarello with Ultegra Di2 on compettivecylist
-Specialized with mechanical shifting from a LBS

My only argument against the Pina is that CC's website says it weighs in at 18lbs without the pedals. With all the accessories, its going to weigh in around or over 20lbs. Besides the bike alone is worth 2500 (if you remove approx $1500 for Di2). Why not invest in another specialized/cervelo for the same $$ with mechanical shifts and help out a LBS?

Any help will be greatly appreciated.