Hi Yojne,
I guessed we met the same little gal @ Banteay Srey. She's a doll isn't she.
Pardon the blown out highlights.;p
Swelthering heat in Siem Reap eh...i loved the countryside though.
Maybe u can consider the 28-135mm IS USM as well? For me, its a relatively gd walkabt lens.
I use my 400D w this lens on it almost 95% of the time, not so ideal for landscape shots tho, but thats when i'll still use the kit lens. ;)