RE: what is better ?
I just saw an ad in this month's AMA magazine, Model Aviation, that has the Hitec Optic 6 with Spectra Module priced at $179.
Now there's a buy.
All the ones mentioned so far are as good as each other, so next thing to consider is the price.
The ad is on page 46, right after the how-to article on making wings "separable".