Recommendations On Building Dell XPS 8300

[squijee]

Im looking at getting a new computer. I like the Dell XPS 8300 line this one

I customize it to have the following

Intel Core i7-2600 processor (8MB Cache, 3.4GHz)
12GB Dual Channel DDR3 SDRAM at 1333MHz - 4 DIMMs
2TB - 7200RPM, SATA 3.0Gb/s, 64MB Cache
AMD Radeon HD 6770
Dual Drive: Blu-ray Disc Drive (BD/DVD/CD burner w/double layer BD write capability)+16X DVD+/-RW
Sound Blaster X-Fi Titanium
Dell 1520 WLAN PCIe card with11n mini-Card & internal antenna
460W power supply
And added 2 USB 3.0 ports

I was wondering if they're any recommendations someone would like to add maybe go with 16 of ram or get a better graphic card? I'm looking to use the computer for a little bit of everything I don't pc game now only because my computer now is from 2002 lol I would def like to plays some new games on it.
I want this rig to last 5 years or more
With coupon code i could get this for $1332.99 not bad imo