1- My advice is that build the rig based in the Crosshair IV that is a very solid mobo
2- I would change the 5830 for a 5850.
3- Can I suggest to you a SSD for ur applications? a good one is around $115 on the egg.
4- Since AMD don't support Tri-channel, the 6GB isn't a good option. Go with 8GB that can be used for ur Adobe applications.
5- The Crosshair IV comes with a X-Fi sound card, so, u can re-sell ur current sound card or install this over the X-Fi that comes with the mobo.
Finally, if the build doesn't fit with your budget, u can go with the Gigabyte 890FXA-UD5 that is less expensive a have a very similar performance that the Crosshair IV.