Hi voxhumana, I use a similar set of plugins with very high stability… Off-hand I can’t remember a recent crash except for one strange situation with VE Pro 5. Otherwise, C7.0.2 and before that C6.5.3, have been very, very stable. I wonder if, as Outsounder mentioned, there is some other hardware issue, or perhaps a subtle software or driver-related issue that you might be able to track down.
Adjusting the motherboard BIOS is an essential first step to maximize stability. Not sure if there is a thread here about that, but search the net and/or contact a professional DAW builder who may be willing to share secrets for a consulting fee. I’ve done this a couple of times, and it has made every DAW I use that much more stable. If I recall properly, there is a very knowledgeable DAW builder in Australia named TAFKAT (do a search, you’ll find him). He may be able to help optimize your system.
Then, the next thing I do with any new DAW is hit it with two good tests, starting with Memtest86+ (http://www.memtest.org/), followed by Prime95 (http://www.mersenne.org/freesoft/).
If the system passes a decent burn-in period with both of those, then I make sure the OS is heavily optimized (too many steps to list here, but many tips can be found all over the net and this forum… not sure if someone has posted an up-to-date guide, but search around), and then I make sure things like DPC latency, etc., are all in good shape.
Only then do I install DAW software. And when I do that, a couple of critical notes – I still turn UAC off, and make sure I stick with one platform – either 32-bit or 64-bit – for 100% of the plugins. I’ve completely given up on bitbridges, since they have always introduced a small variable of instability for me.
I also make sure to select audio interfaces with a known track record of excellent, stable drivers. Recently, a friend convinced me to try RME again (I tried them a while back, but was underwhelmed at the time), but I have to say, RME is pure gold when it comes to drivers right now.
Those basic steps above will ensure a solid foundation to build on.
I have not experienced a single recent crash that I can recall from several of the plugins you mentioned, including Omnisphere, Trillian, PLAY, Kontakt, Komplete (although I don’t use all the Komplete plugins), and piles of others.
Best of luck!
P.S.: As for sandboxing, another option is to use VE Pro, which is pretty dang stable. (Although I did have a strange incident recently that I can’t seem to duplicate…)