1. Liquid cool get you much better temps compare to air results in better OC headroom, but often AIO solutions are sometimes lacking in the noise to temp department.
2. I would rather installing myself with a replaceable fan to reduce noise output.
Thank you OP! I picked up a R7000 from Target just an hour ago for 169.99, swung by my near by Walmart at Morgan Hill, CA and snagged the last one up for 89.99 as soon as I saw your post! You just saved me $80 bucks, cheers!
Usually run Antec PSUs because it's available at my local Fry's and just general wide availability for the brand. Good cost/performance ratio for the most part.
The radiator I installed on top is 140x2 so it fits fine, in your case, you can either search for an adapter or Lian-li sells an extra top that's 120x3 I believe, but then you'll be able to fit the 120x2 on there. Hope that helps.