Rapture Pro is on sale again, and I am tempted.
 
I remember with Dimension Pro I had to load a copy of Dim Pro for each instrument.  For instance if I had two trumpets and a sax it would need three dimension pros. It would not take very many instruments before my computer (at the time with 4 gigs memory) would choke.
 
Over time I have more or less changed all of my arrangements to avoid sampled instruments, partly because of stability problems with too many instances of Dim Pro loaded. But times change and it might be time for me to get involved again with some MIDI horn and violin sections.
 
So the question is with Rapture Pro, does anyone have a report on the number of instances you can have in Sonar Platinum?
 
My current computer has 16 gigs of memory and is an i7-4790, and I have the RME UCX using Firewire.  I usually have about 10 audio tracks, all with a decent number of effects, and Addictive Drums, and TruePianos, and a VB3 on a typical recording. It would be nice to be able to add three strings and three horns and not have to watch the CPU meter, and not have to Archive, or set my latency to a very long delay.
 
Thanks
 
 
 
 
 
 

I'm currently working on a project with loads of soft synths, including 5 Dim Pro instances, 4 Rapture Pro, 2 Rapture Session, BFD2, True Pianos plus a couple of others
My machine doesn't even blink when playing/editing etc.

Samples are samples so your RAM doesn't really care if it's loading ten 100 MB samples or a single 1 GB sample. Rapture Pro's CPU footprint seems pretty light - with 16 GB RAM and an i7 I think you're pretty much set.
 
I have to say I'm finally warming up to Rapture Pro. There are still a few things I'd like to see (e.g., being able to solo elements and better folder management) but there is no other synth that has the same kind of modulation capabilities. The Instruments page is also a gem. I think Cakewalk is underselling it by emphasizing its live performance application...I use it as a way to bring out strategic parameters from a patch for automation and for morphing one patch sound into another. Reliability/stability is much better than Dimension Pro, and Rapture Pro is far more flexible. 
 
FWIW I'm working on several expansion packs which will likely make it out into the world someday. Although I have a lot of soft synths, after evaluating all of them I felt my time was best spent developing for Rapture Pro given how much I'm into modulation and synchronization. Rapture Pro is not easy to program because of the options, but the end results are rewarding.

Hi. I have the same Audio Interface as you, the same amount of RAM, and can easily use 64 buffer in projects with 50 tracks (including RP, AD2, True Pianos etc).
I think as others have said, that you are good to go for years
All the best.

Specific to Rapture Pro, I just inserted 20 instances and midi tracks with different patches loaded on each instance and bounced them to a single track.  No sweat.
 
I use WIN10 on an HP laptop with an i7 5500 and 12 Gb RAM.  I think your system with 16Gb should breeze through it.

Anderton
I have to say I'm finally warming up to Rapture Pro. There are still a few things I'd like to see (e.g., being able to solo elements and better folder management) 

A little off topic, but I'll give that a big +1