New laptop for X3 & Sony Vegas (video) does anyone have any inputs/advice on these specs?

Depending on which system you are looking at they are using a Clevo laptop setup, which is pretty well known for custom high end laptops. Sager and Eurocom are two big names in Clevo laptop makers. I have one, from Sager, and it is quite nice. You can get them without any branding on them, just a nice black case.
 
Your specs are more than fine to make Sonar and Vegas happy. Sonar in particular isn't that demanding. Should be just fine for Vegas too, unless you are really hitting it hard. Remember Vegas knows how to use nVidia cards to accelerate H.264 decoding and FX compositing.
 
Only thing I'd probably do is switch out the WD drive for a Seagate SSHD if you can. Those are Seagate's hybrid drives with 8GB of flash and then a magnetic platter. They give really good performance, particularly for random writes.
 
If you don't play games, and are looking to save money, you could step the GPU down a couple notches. Such a high end GPU is useful for playing games, since they love all the GPU power they can get, but probably not needed for Vegas unless you do really FX heavy projects.

Well all SSD all the time is certainly the fastest. I like having all my samples on SSDs. However it does get expensive. If you can afford to buy enough SSD space to hold everything you need, then sure. If not, then of course magnetic media is the way to go since it is so much cheaper.
 
What I mean by random writes is when it needs to write out a bit of data in a few locations. Magnetic drives are pretty good at sequential access, but are quite slow at random access. So what SSHDs do is have some flash to act as a buffer, which helps them be a lot better with random access. They are nowhere near SSD level, but much better than traditional magnetic drives. They are particularly nice for writes, since the writes can be cached to the flash, but also for commonly read data, since it'll cache that there too.
 
If you have the money to put all your samples on SSD, it'll just mean that your system should never suffer from dropouts due to high polyphony. You won't need to bounce tracks since your system will be able to handle streaming tons of instruments. Of course with 32GB of RAM, loading the whole instrument in to RAM is always an option for many instruments. Not necessary, but nice.
 
Just make sure you can afford to have the space you need. I mean say you need 500GB of sample space. For a Seagate SSHD, that's only like $65. Getting an 840 EVO instead would be about $240 for the same space.
 
But if you can afford it, it is real nice. I have a 512GB 840 Pro for my main samples and a 240GB Seagate 600 for my drum samples and it makes for fast loading and tons of polyphony :).

Thanks for all the info.
I think I will go for 2 SSDs. As you say, much more expensive but I want the best performance possible.
Good tip about the NVidia audio drivers but how do I disable them?

Thanks again.