I say the decision depends on where you live and how much sunshine you get. Where I live in Canada - I can put the top down year round but realisitically do it about 9 months of the year.
My friend Jackson has an E92 M3 with EDC and he and I have driven each other's cars back to back. We both found very little difference between the two cars for daily use.
I'm a huge fan of the folding top (an engineering marvel) and have had zero issues with squeeks and rattles since new.
2010 BMW M3 vert with DCT & Akra (sold)
2012 Porsche 911 Turbo S