Fibre broadband - which one?

Fibre broadband has just become available in my area. I am new to fibre broadband so looking for some advice. My present ISP is Zen who can provide, but at a slightly higher cost, or switch to BT Infinity. I don't know if BT Infinity are any good, but they are offering a good deal for new users. Should I switch from my current ISP to BT or stick with Zen who have served me well for years.
Also, Zen fibre packages are offered with line rental. Do I need to change my line if upgrading to fibre. Also I have a nice router, do I need to change this also?

Who is your line rental with at the moment?

Do you have Sky TV?

Do you want BT Sport?

Do you need a static IP address such as Zen give you? On BT you would have to take a business product as you cannot have one on residential ones.

The BT Infinity service seems to be fine in itself, but there are currently problems with the free modem/router they send out losing connection frequently. The telephone support is not UK and I get a poor impression of it from the posts on these forums. There are also reports that repeated complaints on the in-house community forum can lead to being banned from there.

Zen are good. Plusnet are good, with good UK support plus an active helpful forum presence here and in-house. They allow you to take their line rental or keep what you have, but at a higher price. Static IP address available.

Sky is good but they normally require you to take their LLU line rental, which can be a bit of a nuisance if you decide to migrate out. Static IP address is a bit confusing, I can't be sure. They seem to have it for Be migrations (they bought Be), but I don't know abou others.

Thanks for the comprehensive reply. I have went with Zen as they are more reliable and have UK based support. OK, its a bit more expensive, so swapped phone line as well to minimise the increase in cost.

Thanks again for the advice.

Should be fine .