I had a listen to the first song you created, and replied to it in the other thread.
I guess I was a bit thrown that you did a chilled, ambient piece. When I saw you were interested in trance, house, etc, I was going to recommend you the harder hitting synths like Massive, Razor, etc.
But as I forget sometimes ambient/chilled is a form of EDM (Electronic Dance Music).
So, if you're going to continue down that road, check out Absynth, it has a lot of pads and more 'etheral' sounds.
Also, don't forget Kontakt, especially the orchestral strings. You can always creatively use a filter to help brighter patches 'fit' more into a chilled mix.
I also just remembered you can use reverb and large delays, especially Ping-Pong delays (works great on vocals and drums).