fede1195 :
Math Geek :
your internet speed won't change at all with the new router. the benefit would be the larger bandwidth for yur home network. so if you share files in house or use the network for other stuff, they will see added speed. anything on the network would go toward the faster speeds except the internet speed.
for instance, wireless security cameras, portable devices syncing to your pc wirelessly, wireless printers, streaming steam games to a tv, sharing a media collection with portable deices/xbox/ps's
no benefit to net speed but these others things will see a benefit if you use them.
So I would still get a a max download speed of ~750KB/s, but I will be able to achieve that with more devices at the same time ?
no, because your ISP is going to restrict the total amount of bandwidth that they give you.
6Mbps is 6 MegaBITS per second, which does translate to roughly 750MB (MegaBYTES) per second. You are already achieving the maximum speed provided by your ISP.
On the offtopic note, buying a better modem won't increase your ISP provided speed either, only paying them more money will