What would you recommend?

Hello guys! I have a couple questions for you. I have a '11 Civic Si sedan. I would like to upgrade the Sub and Amp. I was thinking of going with a single 8 but leaning towards a 10". I did have a 1-10" JL Audio in past, but I’m not sure if there is something better. 1)Which Amp and Sub would you recommend? 2)Would you recommend going with a 5 Channel out the gate or just go with a Mono Channel?

2 Rels are better than 1