Hello, I want to buy a dual band router and have sorted between these three.

Acrher C60

Archer C6 1200

Archer C6 1200 Mu-mimu

I know that the C61200 and C60 are old routers(launched in 2016) and that the C6 series are having gigabit ports.

I know the mu mimu router is more recent and have the laterst technology

I requirement is WIFi coverage, considering this.. which router shoulf I take ?

I also plan to connect my old router to extend my range.

Should I go for the new technology ? If yes,then is its range better than c60 ? or if I have to choose between gigabit routers whose range will be more c1200 or c1200 mumimo ?

Please help.Thank You