I would like to trial Sonar X1 or above ...(if indeed I am able too)

Ive gone to Command Centre but I'm only getting a few options such as Artist etc...

Can anyone give me a simple link to do this ?

I have Sonar 7 Producer at the moment. And am running Windows 7

Hi. CCC will only show SONAR 2015. Artist, Professional and Platinum. Older products will not show up.
You can download trial version through CCC. http://www.cakewalk.com/Products/SONAR/Try-SONAR#start
Did you make a Cakewalk account?
Best of luck.

Thanks...yes that's all I'm getting...

It does say try any Sonar version but do they mean current versions ? I guess so

Yes. It is current versions only.

Thanks..yes I thought so.

Could anyone advise me ? I know that the X1 Producer is the top version of X1 ...what is the next one down from that version ? Is it the Studio ?

There are some still for sale in retailers at good prices.

You should read the info here
http://www.cakewalk.com/Products/SONAR
 
it explains about the versions and what you get. 
 
Forget about the X versions unless you go buy one in a box from a store. 
The names have changed and PLatinum is the highest version now. 
I would start with Artist to see if you like it as they will then send you offers to upgrade at a better price than if you do it outright. There's nothing to lose now with the monthly plans for owning it outright and the many ways you can deal with paying for it. 
 I saved over $200 by slowly ugrading from X1 LE ( free)  to X3 Studio ( $99) , to Professional ( $99)  and now PLatinum. ( $199 ) And I still have all those other version on hand that I use on othe computers. 
 

Thanks...I've been checking prices and Artist is available here for about £67....

I think the only thing I'll miss is Real Space covoluted Reverb from my Sonar 7 producer

I'll probably go for that option and as you say maybe upgrade at a later date.

Rarecomponent123
Thanks...I've been checking prices and Artist is available here for about £67....

This seems high. The published upgrade from SONAR 7 Producer is $49. The product is only available as a download so do not worry about buying a boxed version (unless you collect cardboard).

Oh sorry..I was talking about the box edition....I wasn't too sure if there was an upgrade straight from Sonar 7 to Artist.

I added some more info in the previous post about the box. There is no disk available for the new SONAR, the box contains a card to redeem the download from the Cakewalk site,