Looks to me like in addition to everything included with Rough Country lift, the TeraFlex kit also comes with a track bar relocation bracket, bump stops, and extended sway links. All of those will be good to have.
Further, if you get new shocks, you won't need the shock extension brackets. The TeraFlex kit offers an option to get the kit without brackets or shocks, so it'd be a perfect fit for you. You will need to account for the shocks somehow--whether through longer shocks or extension brackets.
Finally, do your research online, but you should make purchases like this through forum vendors. Sending them a PM will usually get you the best prices, free delivery, etc. I know JeepAddOns sells Rough Country products. I've heard Northridge4x4 is great for TeraFlex stuff. Etc. There are many others.