There are certainly A LOT of options out there, and there's also a lot of personal preference, so you are going to get a lot of different answers to this question.
For pads, I prefer either Impact Gel or 5 Star. Love the 5 Star because you can fully customize them and they come in any thickness from 1/2" to over 1 1/2". I like the Impact Gel, but the downfall with them is they've got the one thickness.
For cinches, I love the Professional's Choice SMx VenTECH Cinch. Spendy, yes, but I've gotten a full 2 years worth of riding on my first one. I thought about buying a new one for next year, but I"m going to clean it up really well and I bet I'll be able to use it next year too. Talk about durable! It's held up so well. Professionals Choice SMx VenTECH Barrel Cinch