If the price is about the same, I'd say 28i for sure. I personally think the sport seats are much more comfortable than the regular seats. With the regular seats I feel like I'm going to slide off of it every time I take a turn.
E89 Z4 sDrive35i 7DCT "Zayna", Alpine White/Coral Red
E92 335i 6MT "Calixta", Space Grey/Coral Red [Retired]