I love the Radian and it's a great learner plane, but I'd have to go with the recommendation for the EasyStar as a first plane, simply because it can teach you more.
The EasyStar is a plane that can do anything. It will fly slow. It will fly scare the pants off you fast, it can to aerobatics, it can soar, taking advantage of thermals. It doesn't have an doesn't need ailerons, but you can add them painlessly and the plane will have some additional capabilities with them.
And finally, like the Radian, every single part of that plane is for sale as a reasonably priced replacement part. The Dynam stuff? Don't make me laugh.
One thing you DO KNOW. You will crash. You will need replacement parts. If you want to keep flying and have a chance to make RC a persistent hobby and not just a one weekend fling, the EasyStar and Radian will get you there. The Dynam will beat you up and leave you for dead on the side of the road.