RRD Avantglide vs AHD FD68

I am planning to buy an AHD FD68 for light-moderate wind conditions. I have also an opportunity to get an RRD Avantride M or Avantglide M with good prices. I am an intermediate sailor. No problem with straps and harness. No jibe at the moment. I'm 70 kg and a very quick learner. I don't want to change this board in one year or so. I'm going to use it with a GTX 6.5 (as the main sail) and later with a GTX 8.0.. I want to get good top speed and early planning. (I also heard that the FD68 is not the best early planning board?)I am interested with the concept of RRD Avantglide M but I couldn't see any comment about it on forums. I saw a test in Planchemag and the board was the test winner. Is this board very technical for my level or can I handle it somehow? Do I have to stick with FD68 or RRD Avantride would be less technical than Avantglide?
Any feedback and suggestion will be highly appreciated..