Actually posted over at road forum but was hoping input from mechs here...to make sure there aren't any issues I may have overlooked.

I need more lower gears for climbing (I'm a clyde yes)...running a short cage campy derailleur.
Official campy stance: medium cage needed for 13-29 (rather not do that) but some say they run it just fine...

I don't like the idea of losing that much tall gearing so leaning towards the IRD 12-28 (120 bucks) or the Miche 12-27 (60 bucks)

Anyone have experience with these cassettes? Any recomendations very welcome.

Thanks always!