We upgraded to FTTC a couple of years back, when BT were doing a "special" offer. Infinity 2 unlimited.
Unlike some of the other commercial turds that sell you stuff, we are still on the "special" and I have never seen BT cheaper than we get it. So right now, I am a fan of BT. Unlike about 6 years ago.....
Like OP, mainly 2 oaps, but when the children come over, we need the mbps.