Correct you will need a boost solenoid.
You can use the stock one or get a 3rd party unit, dont buy the AEM badged solenoid as its just a MAC vavle with a markup of nearly 80%, its a great vavle but get it somewhere else, Ryan can source these at a very resonable price.
When the AEM boost control is setup properly it works a treat, its also one of the only boost controls that I have seen maintain the same boost on and off a dyno run, you can also configure speed dependant boost to aid traction at lower speeds. This is how mine is setup.
The AEM can do traction control but I dont know anyone who uses it yet.