I use the link system and it is awesome. If you purchase the link for the largest sled, voyager I believe, you will be able to link all the different houses. The only exception would be the guide because they are much smaller. I have the voyager link and I have linked my yukon to another yukon, to a sleeper, and to a 5600. I have not linked to a voyager, but it is the same link as the sleeper. The larger (voyager) link works with all, you may or may not have just a little bit of extra depending on application. This is because the voyager link is a larger circle than say a 5600 circle, but the extra does not matter, you just wont use the extra material left over. Hope that makes sense.
The system works very well, I have been very impressed. Even when I have ice build up I have been able to link fairly easily, its a bit more effort but not to the point where you would not want to use it.
Good luck, just remember to buy the largest link and you will have the ability to link with all the different houses