I stayed in a Jr. Suite at the DTD Hilton about 6 months ago and thought that it was nice (upgraded due to HHonors status). I also had lounge access. The Jr. Suite was ~150 sq. ft. larger than a standard room (looking at the pictures on the Hilton website). The lounge was OK as far as Hilton Executive lounges go, but I mostly only went for breakfast (I had appetizers on one night and the selection was limited), and the lounge was very crowded. The executive lounge staff/concierge were excellent.
That being said, I would choose the Towers room for the lounge access. From the pictures/information on the Hilton website the rooms look newer and have additional amenities.