I love them both but ultimately went with the 20" LM-R's on the E90. I don't run them on the car all the time, but when I put them on I just fall in love with the car all over again. LM's are on my E30 and they are perfect on the older car.
2011 E90 M3 - Alpine White/Fox Red Extended
Premium/Convenience/Cold Weather Package - Competition Package - M-DCT - Sunshades - EPS - BMW Apps - Sat Radio - Ipod/USB