My thoughts:
I have a gtx 660 in an old intel core 2 Q8400 (old processor now), and my games still look pretty good (I am only using it on a PCI 1.0 bus too!). That card will be able to play anything that is released on the xbox 360 and PS3 consoles and at better fps/resolution. Any more than the gtx 660 and I believe you start to get diminishing returns. Don't panic, I am sure your rig will be able to play games at a 'playable' level for a few years yet, with revent release such as Tomb Raider at a high spec. In a few years time you can upgrade. Some people on techy forums have a different reference point for a rig being particularly good at something.
Your processor is pretty damn good and with an SSD your machine will be very fast. Of course how fast you perceive it to be depends on what you are used too, but I am sure you will be happy with it. What I would do though is look at adding a conventional hard drive in the future, as SSD memory can degrade quite quickly in comparison. Nothing to panic about, but I think you will want more than 240Gb anyway in less than a year. Some games are 30Gb's! And with video editing you will use that quick - don't forget windows uses something like 60Gb (I may be wrong on this, but it is a substantial proportion of a 240Gb drive!).
Long story short: don't panic, I am 100% certain you will be happy with your PC. I would advise that you read the manuals and start to learn a bit about the components though, it takes time but it really helps you understand what you need in a PC.
I have a gtx 660 in an old intel core 2 Q8400 (old processor now), and my games still look pretty good (I am only using it on a PCI 1.0 bus too!). That card will be able to play anything that is released on the xbox 360 and PS3 consoles and at better fps/resolution. Any more than the gtx 660 and I believe you start to get diminishing returns. Don't panic, I am sure your rig will be able to play games at a 'playable' level for a few years yet, with revent release such as Tomb Raider at a high spec. In a few years time you can upgrade. Some people on techy forums have a different reference point for a rig being particularly good at something.
Your processor is pretty damn good and with an SSD your machine will be very fast. Of course how fast you perceive it to be depends on what you are used too, but I am sure you will be happy with it. What I would do though is look at adding a conventional hard drive in the future, as SSD memory can degrade quite quickly in comparison. Nothing to panic about, but I think you will want more than 240Gb anyway in less than a year. Some games are 30Gb's! And with video editing you will use that quick - don't forget windows uses something like 60Gb (I may be wrong on this, but it is a substantial proportion of a 240Gb drive!).
Long story short: don't panic, I am 100% certain you will be happy with your PC. I would advise that you read the manuals and start to learn a bit about the components though, it takes time but it really helps you understand what you need in a PC.