Seems like no one here has ever heard of "Ace Da Brain" (aka Ace's Delight & Pervading Call), imho the best producer germany has to offer... Try to listen to his Songs like "Trinity (Aerial Mix) or something harder like "Depths of Doom". Ace is practically unknown, but he surely beats commercial dance artists like Paul Van Dyk easily (compared to Ace, PVD is nothing more than commercial radio music).
Another good group are "Alphazone", which makes fast-paced, hard and yet very melodic "Energy-Trance". Thus, there are of course no cheesy vocals. Simply bangin' stuff
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Beside these two, I can't recall any artist, which would've been worth buying his records this year, so far, this was no good year for me yet...
My third fave would've been "Kai Tracid", but he suddenly stopped producing good music and went on to produce "Minimal" (simply cheap sounding stuff without much melodies) from now on...
And to be put short, artists like "Cascada" and "Groove Coverage" and "Rocco" etc. are NO TRANCE!!! They're simply producing some La la la-crap to gain lots of money (which seems to work very well, though).