I am having the same problem you are facing last year. Let me share my 2cent here...
I am 30yrs old... I love the outlook, especially the front eye lid, so garang! Interior plus the I-Drive of E60, talking about 530i here... I really don't like the front (eye lid kind of look down, no sharp look) and rear eyes of E90... Plus my bodysize, the agent is right, E60 fits me better... Consmetic wise for the E90 really turns me down, compare to that of E60...
Next, test driving... Getting on the E60 with all the excitement... Feel so great in the cockpit... Auto adjust steering... On the road... Kind of feel weird... Where is the power... Feels very sluggish... Something is holding the car back... Realised the E60 is for comfy, not power... Put on downpayment for it...
Next day, accompany a friend to test on E90... Looking at the 90 & 60 paking side by side, wondering why would someone pick the 90 if financially is alright... Friend back from test driving... Gave all good comment, suggest me to give it a try... Get on the 90 reluctantly... WOW!!! Its so different from the 60!!! All the power is in!!! Push, it goes... Push again, it goes again... Yet, I am still in normal mode, not sport nor manual!!! The power is like no limit!!! INTERESTING!!! Immediately look at the 90 modification choices... Hmm... 90 has its potential!!! Change my order from 60 to 90... Agent keep pushing me to keep 60... HaHaHa...
End of the day... I am not a single bit regret on deciding the 90... Especially so many 60 got rob!!! HaHaHa...
So my friend, how old are you and what are you looking for? Power or Elegance? Power=90, Elegance=60, simple as that!
p/s: hope you will join us... E9x! HeeHee...
p/s: if the time got sport edition, sure I will get the 325i Sport! Darn the AB!!! Should let us know what package will be available at later stage... But will we be able to wait for them to come out with the package though... HaHaHa...