^ How about the new AMD 1055T ?? IMO if you are fine with overclocking, then you can easily set it to run @ 1090T's speed and it will offer very good performance IMO...Also FSX take good advantage of multiple cores right ?
1055T + HD 5770 http://www.newegg.com/Product/ComboDealDetails.aspx?Ite...
The newest Adobe software can offload some processing to Nvidia graphics cards, but not ATI cards. For this reason, you might want to go with a GTX 460 for your video card. You definitely need more RAM for Photoshop. I would get at least 8 GB, more is always better.
^ Well that majorly applies to Premier PRO and Aftereffects...For Photoshop and Lightroom, you would need a OpenGL supporting graphics card to take advantage...and HD 5xxx support those... http://kb2.adobe.com/cps/405/kb405711.html