Wow, thats pretty good for having the router at one end.
Any chance someone in your area does cabling installations? I know if I was there, we'd be up in the rafter running CAT6A. I can be done after the fact too and would look good. I used this in my existing house that was old for running cabling:
http://forums.dlink.com/index.php?topic=52726.msg202260#msg202260As for getting another, review this first for your considerations:
http://www.smallnetbuilder.com/wireless/wireless-features/32238-ac1900-innovation-or-3d-wi-fiFor the size if your house for your current configuration, I don't think you'd benefit greatly by spending that kind of money on a 895 if your going to use it as a wired AP. If you could move the 890L to a more central location.
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You might do better by installing either a wireless bridge and use it as a wireless/wired connect to your office PC(s) or maybe a extender however I prefer bridges has they have better performances and are less ****e to cause interferences.
Would look something like this:
Suggested N or AC WiFi Bridge UpgradeThis represents getting wireless signal using a bridge to a game console however works for PCs and other wired devices.
Yes you can use another wired AP however you have to get the wire from the 890L to the 895 if you did this.
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