Router Recommendation? (v6プラス)

Hello, I need to change my current router, I would avoid keep renting one from Otegaru Ikari (my current provider), as 400 yen each month sounds not very cost effective on a long run.

Any recommendation? I need the v6 plus version, I checked few of them on the major ecommerce sites and the prices are pretty high, especially for the Buffalo ones, still if it it worth the money I might consider it.