I'll help answer your question directly. First off...with the kites you are coming off of, any of the newer Cabrinha kites will be a huge relief on the bar pressure. Second, if you want the best value and bang for your buck, I would to with the SB (switchblade) IDS in either 2012 or 2013. The CB (crossbow) IDS is a great kite also, but more expensive and a little less versatile overall in my opinion. The Cabrinha kites are extremely well built and have one of the better safety systems.
Regarding the 2012 or 2013 Sb IDS, the 2013 has 3 main differences. It's faster turning, has lighter bar pressure (not a big difference though) and has less low end, but a little more high end. The 2013 bar also has a better reride system for the safety release.
If you want to save a little, there's some great deals right now on 2012 SB IDS's including from me, but if you have a really good local dealer, I'm sure they'd appreciate the business.
I hope this helps and good luck.