There are several threads on 25 vs 30 that you should check out -- they are very informative. Also check out the thread on celebrities with their speedys for pics that show the scale of the two sizes as carried by actual people. I'm 5'3" and went for the 25.
I'd go with the 30 also. I see a lot of ladies who buy the 25 thinking the 30 would be too big, and then they later wish had bought the 30 in the first place.
I'd go with the 30 also. I see a lot of ladies who buy the 25 thinking the 30 would be too big, and then they later wish had bought the 30 in the first place.