Just some pointers on what I've read for these 2080TI's and I apologize if you already know this info.
From what I've read the best approach seems to be a minimum 240mm radiator but a 560mm can really help in holding upwards of 2100mhz or higher. I haven't actually done it but I've been reading as many reviews or posts as I can regarding it. A 120mm or 240mm will work for stock or minimum OC but they work harder for it. I also read it's not necessarily a good idea to have it combined with a CPU AIO but it can be done if planned properly. Kyle made a really sweet rig with his.
From what I've gathered you can get some small gains from going larger on the rad, but I don't really care I just want relatively silent operation with high clocks (1900s). I'd need to spend 150-200 for an x62 kraken and G12. These cards we have are also non-a's so we can't even put the higher power bios on them. I'm only considering AIOs right now and from all the videos I've looked at/articles read it's absolutely fine. I'll probably put some copper heatsinks on the memory but that's it.