Wifi Broadband : Which telecom/ISP do you prefer/using

I think my UNN wireless router is old/weak and I think my ISP is Imagine. I wanted to get a router upgrade, but there's no mention of router upgrade availability in Imagine's FAQ or plans. I've seen router upgrades included in Progresif's plans and I thought that was nice. I've heard a lot of complaints about the pricing of Progresif's plans, but these are mobile plans, right? So I want to know about your experiences with Progresif. Also, please share your experiences with changing telecom providers. If I'm going to switch to Progresif, I want to know what to do and what to expect.