They're coming along with Infected Mushroom and long awaited Rank 1 in January for Ultra Spin 4. That should be a wicked trance event to look forward to in the New Year! Anne Savage is booked for that as well so should be a good one.
I saw G&D at Gatecrasher NEC last month and they were great. They spin a very unique style of prog and trance but with some kicking beats underlying throughout. Look for a few popular songs remixed that they like to throw into their sets. Just heard their latest Global DJ Brodcast - if you can find it, grab it and check it out - it will be similar to how they play in Jan I'm sure.
I saw Rank 1 in Montreal last summer and its a DJ set. Only one person of Rank 1 can spin the other person can't. Its too $$$ to have a live set - only in Amsterdam will they perform live.
It was great to see him live and he spun all the classic tunes.
Other acts I heard was Dumonde is coming back and maybe Blank and Jones - they cancelled the MOntreal date.