Hi , my needs are , mixing, mastering and recording vocals and guitars,  my setup is , UA25EX interface and cakewalk sonar producer 6,  on a desktop, with 16 Go rams and intel i7 , my computer is ready for the job, so my question is , for my needs , what is the best to buy ? , sonar producer 8.5 or sonarX2
thanks all of you 
 

Sadly, you cannot legally buy 8.5. It's X2 or stick with S6.

While there might be some 3 year old "new in the box" versions of 8.5 floating around, they have to be scarce. If you do have an opportunity to buy 8.5 make sure it has not been previously registered. Otherwise it is X2. Or the soon to be released X3 (at least that is the rumor).

SONAR X2 is a pretty powerful program. You can check it out for free here:

http://www.cakewalk.com/p...s/sonar/web-trial.aspx

thank you very much all of you for your help,  i'll try the X2 trial version  as submitted by Dan Gonzalez

scook
While there might be some 3 year old "new in the box" versions of 8.5 floating around, they have to be scarce.

 
Version 8.0 is still easy to find, but 8.5 does seem to be rare.  Maybe that's because 8.0 was the last version available boxed only, i.e. no download option.

And the good news is you can keep your old version installed. Sonar is great that way in that you can keep upgrading versions without losing  the old ones. 
Your new X2 version will be 64 bit so you might want to keep 6 around for working on old 32 bit projects. 
The bad news is the X series is like starting all over with a new DAW, 8.5 is pretty much the same as 6 so easy to switch too. Good luck.