Don't forget to decide if you are vacuuming out via Topsider, or draining from below. If draining, be prepared for a holy mess. The last time, I tried using a 1-inch PCV pipe elbow which I slipped over the hole as I pulled the drain plug away. Believe it or not, this reduce the mess 80%+... will try it again next time also.
OE (Genuine JLR) or OEM filter is preferred, I'd avoid non-OEM but that's just me. Any of the oils listed will be fine if you are changing at 5-7kmi. If you want to change at 10k+ intervals then you should be more picky about the specific oil.
I feel like 7k miles is where I’d feel more comfortable in between oil changes. In saying that, will I see any tangible difference by splurging for the AMSOIL over Mobile 1 EP or Kirkland? There seems to be a significant price difference in AMSOIL ($11-$13 per quart) in comparison to the other two. I don’t mind spending a little extra for quality stuff if it truly makes a difference. But would hate to just pay more for just marketing.