@tgoschuetz 

In a way

you can get 2 independant links of 1gbit to your modem, but each individual link wont aggregate to get you 2gbit.

We have a 1.25gbit connection at work, and i use an ER8411 with three links to the modem, with 8 vlans policy routed between them.  On a windows machine with 2 vlans on two different interface that happen to be on vlans that are routed to two different WANs, windows *can* aggregate it , on speedtests anyway and exceed the 1gbit limit of one link.  On any device with just one like, you will only get 1gbit (940ish in reality)

However, all this depends on whether you can assign each wan interface a different IP from your modem.  IF you only get one IP, this wont work.

I have my network at work set up this way so i can allocate a full 1gibt worth of bandwidth to all the staff, office, technical team etc, and leave the remaining 250mbit worth of bandwidth to the Public WiFi and the bar-restaurant using bandwidth limiting and QOS so neither side of the network can choke the bandwidth of the other.

I take a different but related approach with the rest of the network structure - each main switch has at least a 2 link LAG back to the core, so for example someone using the full 1gbit bandwidth on an AP on my POE switch wont choke out all the other APs on that switch as there is a 2x1gbit link back so if one is fully utilised the other has spare capacity without any significant traffic shaping / contention / throttling going on at the switch level