I just picked up a GTX 750 Ti video card and have come to the realization that my XPS 630 is just not going to cut it anymore after five years.
Since the GTX isn't the best card on the market, I'm not looking to go all out in terms of upgrading my rig. I'd rather just get some really good parts that I can overclock hard and produce great results (High settings on new games like Planetside 2 and Titanfall) for the next year or two.
As many here probably already know, Dell has the Q8200 locked down to prevent overclocking, so I need to upgrade the CPU and mobo.
You should be fine, as long as you have space in the case you're working in to place all of these components. Your OS may have some trouble configuring to the new hardware (If you have the stock OS with all the bloatware and no way to reinstall).
Another thing to consider if you're planning on overclocking is buying a decent CPU cooler (not stock), and making sure you have room for it in the case (the XPS cooler will not work with the 1155 socket, because the Q8200 is a LGA 775).
Check if you have enough cables from your power supply to plug into all of the new components. Careful with all of the plastic things Dell puts into their computers (if you have them).
Oh, and I have the same CPU/Mobo. They work great.