I've seen the videos and they look really cool, I just wonder if I should just buy top of the line or shoot for the gen 2 and wait a few more years to get top of the line.
Top of the line only lasts for about 6 months to a year in this industry. They are always coming up "bigger and better" stuff to get our money. Just a couple of years ago HDS 8s and 10s were top of the line. Now they are two series old. In another year they'll be obsolete.
Pull the trigger on what you can afford to buy. I don't think the 3D is something that you need right now. You will be so amazed and occupied with the Side Image and Down Image that'll you be plenty happy. Maybe a good happy medium might be to buy a Gen 3 so that when you do get accomplished with the SI and DI you will have the option to buy the 3D module and get to the next level.