If you're going for AMD gaming build. Spend a bit more for the 9850BE.
Or go with a X2 5400+ BE, spend the extra cash on a nice gaming case with PSU.
There's a reason why they bundle stuff, so they can get rid of them. Basically nobody is buying 9600, you should not buy it either, especailly a gaming build.
I can't justify the extra cost of the 9850BE, honestly. The Phenom 9600 was slammed with the TLB bug, which ruined its rep, but it would never affect the average user. It makes for a nice bargain for a quad-core chip, though. The 9850 isn't much of a better OCer either. The combo deals comes with solid parts, so I can't really fault it.
Hold up, you are wanting a gaming build? Then dump the 3850. It's a good card but there are better for the money. Look at an Nvidia 9600gt, newegg has one for about 100. Also, maybe consider going to a dual core like a 5200+ or a 5400+ and getting a 4850 video card instead. A dual core would still run well, and if gaming is the primary concern, then I think personally, if your processor is reasonably fast, your video card is the much more important factor here. If the processor is dual core or better and reasonably quick, you should be fine. Or for a balance, maybe look at the phenom x3 series chips.