We didn't find out w/ #1 and I LOVED everything about the surprise.
We didn't find out this time either and I regret it. This will be our last and I am having serious anxiety about the possibility of gender disappointment. I've even tried to get my dr to find a reason to do another u/s so we can find out even though I only have 3.5 wks left before my scheduled c/s.
In you case though, you have both genders already and have experienced finding out beforehand so maybe don't find out this time so you can have a different experience this time. Just don't allow yourself to get attached to a specific gender to where you may be disappointed.
Happily married to my prince charming and SAHM
to R (2/2010)
and L (12/2012)