Hey bsquizzato
Good for you on the planted tank
Just some quick responses
Yes you need to do ammonia dosing if you are going to fishless cycle.
I would pack the tank with cheap stem plants and grasses at first to get a plant mass established and then move onto the specimen plants you want.
Anacharis and Excel do not do well together.
Read through the posts "crash course" "I need help" there is a lot of good information there to soak up (no pun intended)
I am not familiar with the Eheim filter you are questioning...sorry
Stay with the forum, there are some up and comming newcomers to planted tanks here who are working through the same issues.
Regards,
Jay