Hey, will i get any benefit from installing an SSD, does Sonar respond to that or will it make no difference? Many benefits computer-wise i know, but will it benefit Sonar? 
 

Only in the same way that it will benefit computer operation in general. Way faster loading of the core program and samples, more bandwidth for audio tracks (if also recording to it).

Sanderxpander
Way faster loading of the core program and samples

That reason alone is good enough for me.
 
Call me impatient or whatever, but i hate drawn-out slowish load times when it comes to DAW projects. Even 10 seconds waiting is enough to test my patience. It gives me a buzz when i see any computer program snap to it ready for use within seconds.

Been using them for a while now-speed is worth it, no doubt 
My desktop and my laptop both have SSD for OS/app C: drives

I have 2 ssds and it's wonderful... with 7 drives total, I recently had a single platter fast drive fail and ended up temporarily re-pointing some Sample Logic files to an external backup drive... it is sooooooooooo slow I'd forgot what even a difference a fast normal drive is, let alone the ssd...
 
coitus interruptis at times is ok but...

It's been answered, but I want to also add to the SSD fan club. Watching Sonar open and be ready for use in blistering time is a joy and reason enough for me to always want to keep an SSD drive powering the OS. Plus as the others mentioned, samples and loops are another area I see a big improvement.

I have 2 SSD's ...if I could afford it all my drives would
be SSD's....

The most obvious benefit is for load speed of programs. My system boots in about 15 seconds or less.
As others say its also beneficial for storing samples and other stuff that requires fast dynamic access. If you can afford the cost per MB then its great for audio as well. In most cases however the throughput of a normal hard disk is not a bottleneck for audio streaming. You could put your picture cache on an SSD however since that will greatly speed up waveform generation and drawing and not require a ton of space.

There other benefit that gets too rarely mentioned is that they're silent. My music computer now contains no fans and very few other moving parts. I've still got a whirry big audio drive, but that's it. As soon as I manage to replace that, the computer will be entirely silent.
 

Looks unanimous. Thanks guys, i'm convinced. The latest Samsung 580 Pro looks to be the go for me. So the benefits all-up...
 
1: Silent
2: No moving parts that might be susceptible to malfunctioning
3: Uses much less battery power
4: Loads everything super-quick
5: Laptop ends-up weighing less
 
Can't see any negatives from where i'm standing. Looking good. Every advantage helps when making music. Cheers.