I have to agree with some other posters that recommended the YC, and I'd go further & tell you to definitely get the Waterview...
IMHO the BC lobby is definitely overrun with children in the lobby... also, when we stayed there I wasn't impressed with our balcony at all, I think we got one of the small ones...
On the contrary, it was SO peaceful walking through the YC lobby, so different than BC... It had a darker interior in the lobby, it seemed so elegant, but yet the rooms were just as light and airy as the BC... You'll be guaranteed the balcony at YC & you'll have use of the great pool!! If you have a waterview, your view is going to be awesome of the lake, overlooking the BW... for a couples only trip, this is your best bet!
I personally love the BW, but you are never guaranteed a Boardwalk view... I don't mind the standard views at BW, but if it was just my DH & I alone on a trip I'd definitely choose YC Waterview!!