Thanks again badger1.
Yes, I know how silly to ask other to choose bike I will ride. Different preference, different geometry, different height/weight etc.
The problem is I don't know much experience or sense to fill the difference. Honestly I don't know what's the perfect fit of geometry even I sit on various bikes - simply lack of experience. Thus I posted
Your comment and thought were much appreciated and very helpful to understand how I should approach the bikes.
Today I visited specialized concept shop in Tokyo, but no luck. They don't offer any test riding of any sirrus series which was quite disappointed.
So far, BB9 and elite are more less same grade.
After talking with specialized staff today and reading your previous comment, I concluded that sirrus comp is better or worthy to pay extra.
Thus, Sirrus comp beats (BB9 and elite)
Then now I have only 2 options left - either sirrus comp or BB 29er (price is more or less same)
I understand it's now all up to my personal preference.
29er - heavy but comfortable feeling
Comp - very light and great drivetrain (over-spec to me) and good chance to try thin tires.
hmmmmm while writing this reply, I realized I should go with Comp then hahaha
Once I buy one, will update this thread
Thanks badger1