what's a good wireless router , mine needs replacing

[brimfull]

I have netgear one , keep losing connection

I think it depends which service provider you have. I would ask them what they recommend. I had the same trouble with my netgear router so asked AOL what they recommended and they sent me one for free. Bad news is it didn't make any difference.

Losing the wi-fi connection between something like a laptop and the router, or between the router and the ISP ?

laptop and router
it's not laptop playing up def router