Crossgrade

I currently have Sonar Professional and received an offer to crossgrade to Platinum for a special price. If I crossgrade, does that mean I still pay a monthly subscription or does the crossgrade price cover me for the remainder of my first year or for another full year?

I would call it an upgrade. It would depend on whether you are on a monthly plan or not. I would simply pay the upgrade price out right. On the other hand if you find that too much at one time you can stay with a monthly plan. I don't know if you would pay more but you should have that information already. 

I highly recommend contacting customer service, they'll make sure you get the best deal. The upgrade is definitely worth it...

It sounds like it. I hope it works out for you. Platinum is a great version. 

Because the changes have been, mostly, incremental, it is sometimes hard to remember why X3 runs a distant second to what is now available. My boys are still using 8.5 in their recording setup. I encourage them to update but they say 8.5 does everything they need. Unfortunately, I am one of those people that needs to upgrade to the newest and shiniest version of anything, regardless of whether it would be of any advantage. Fortunately, Sonar upgrades are of great advantage.