Hi Dsil,
Well, congratulations on getting your warranty exchange mattress chosen. I think you’re making the best out of your options with a choice like you did.
Regarding the topper, I can only provide guidelines, as just like a mattress there are too many individual variables involved for me to be able to pick out a mattress topper that might be comfortable for you.
I would start (if you haven’t already) with the topper thread here, and the topper selection guidelines in post #8 here. Some basics from that post:
If the mattress needs just a “touch to a little” extra softness or a softer “surface feel” … then a 1" topper is usually enough.
If you need a little to a fair bit of extra softness and pressure relief … then a 2" topper would be in the average range.
If you need a fair bit to a lot of extra softness then a 3" topper would probably be the best choice.
Heavier weights generally do better with firmer and thicker toppers.
Lighter weights generally do best with softer and thinner toppers.
In general … 19 - 24 ILD in latex would be considered to be in the soft range for “average” body types while very light body types may be OK with an ultra soft 14 ILD and heavier body types would probably do better with 28 ILD and above.
You mentioned you were considering 2" of a 20 ILD topper, which would be quite plush and provide in general a “moderate” amount of extra softness. As you stated that you like a “medium” feel, it may be that you would desire a bit of a higher ILD (maybe mid-20s) or a thicker layer, or perhaps both, Only your own careful personal testing will tell. While toppers aren’t normally returnable, mattresstopper.com (from site member Brooklyn Bedding) has recently started to offer Talalay toppers with a 30 day return policy. At the very least, they may be worth a phone call to see what advice they might have for your situation, which can often be the most helpful route when you’re not able to test an item with the topper on it in person.
I’ll be interested in learning about what you eventually decide to do, and if you have any other topper questions.
Phoenix