Upgrade for RT N15

[Pro2011]

I am using a router Asus RT-N15 and wanted to upgrade.

I have an internet connection to 120Mbps/6Mps, 2 desktop connected by cable, a NAS and 2 laptops connected by WiFi.

With the RT-N15 connection between computers and very slow:

- 17 to 20mbs wired
- 2 to 3mbs wifi

Looking for a stable and fast router for Internet access, and better communication between computers.

I was thinking of three routers:

DIR-655
DIR-825
DIR-855

Which of these will be improved and upgraded to the RT-N15?

 

[stevech]

I have an internet connection to 120Mbps/6Mps...

Did I read this correctly? Your internet provider delivers 120Megabits per second downstream? That would be what, FIOS top tier? $$$$$$$$$$

No consumer router, esp. crappy D-Link, would support a 120Mbps WAN port.

Buying advise:
Trade-down to a lower speed Internet Service and take the savings and go to Hawaii.
If you truly have 120Mbps, you probably have metro-Ethernet that costs several hundred $ per month and thus it's likely a professional setting - and you're into Juniper and Cisco territory for business prudence of security.