Don't you already know how to fly Gary? Just wondering why you want a trainer.
That Goldbeg has to be the nicest looking Cessna style trainer going. Most people say Goldberg is great quality, however, I recently bought a CGM plane and was very disappointed in the quality. Maybe I just got a bad egg, who knows.
I had a Tower 40 trainer, and that was a very good flying plane, but not nearly as nice looing as the CGM. From what I've heard, the Tower trainer is an exact copy of the GP PT40, and it seems like just about everyone agrees that the PT40 is the best plane to learn to fly on.
I have heard a lot of bad things about Nitromodels in general, but I have also heard that with a little extra work, they can be made into good planes. Who knows?
If I were looking for a trainer now, there is only one I would consider, the H9 P51 PTS trainer. http://www.horizonhobby.com/Products/Default.aspx?ProdID=HAN2845
Shoot, I wouldn't mind having one even though I don't need a trainer! There is one on Craigslist right now, they are asking $200 for it, already built with engine and servos! http://houston.craigslist.org/tag/848626881.html
I am very tempted to buy it myself, but I already have too many planes lol.... By all accounts, they are every bit as good as they claim to be, and then some.
Actually there is one other I would recommend, and this may sound crazy, but I would actually recommend a Sig Somethin Extra as a good trainer. I have two SSE's, and let me tell you, they fly SO GOOD! On low rates, they are so gentle and forgiving, and super easy to fly, easily as easy as my Tower trainer was! But turn on high rates and it beccomes wild animal! Of all the planes I have flown, the SSE is by far the most confidence inspiring. I use 10-15 degrees of flaperons on mine, and it can sustain controllable flight at about 5mph! Using flaperons, it will simply amaze you at how gently you can land it. I think it is actually easier to land than my Tower trainer was, no kidding. Like I said though, only with very low rates. Turn the rates up, and this thing will kiss it's own tail with a flick of the stick. It's definitely a plane you can grow into.