Hi Rosenthal311,
You have several options available to you but the first one I would suggest is to do nothing for the first few weeks. Your mattress won’t “break in” and soften in the same way as foam but it will loosen up a bit and in most cases adapt to your body to some degree and so it may become “more comfortable” and you will also go through an adjustment period with any new sleeping surface.
With the entry level Vi Spring Elite (which I would tend to avoid unless this specific mattress was the absolute “perfect match” for you which would only be the case for a smaller percentage of people) … a box spring that flexes underneath it (vs a foundation that doesn’t have springs that flex) will definitely make a difference in the feel and performance of the mattress. There are also other options available that may also help in a similar way to a box spring that can also provide some additional flex under your mattress such as a flexible slat system which may help as well. Some examples are in the foundation thread here under “tension adjustable flexible slat systems”.
In addition to this … you also have different options available for the spring tension of your mattress (which is based on BMI) and if you are “on the edge” of one of them then it may be worth contacting your dealer to ask about exchanging for a different (softer) spring tension in the same mattress.
Other than this … VI-Spring does have several toppers as beauport mentioned but they are close to the price of a new mattress by themselves and may not be the most cost effective option. The mattress pads you listed are made from synthetic fiber and would provide some pressure point relief under your pressure points but they won’t be as effective as the sleeping surface of your VI-Spring (which has natural fibers such as wool for ventilation and moisture wicking) in terms of temperature control. They are also made from synthetic polyester fibers and for many people that choose VI-Springs, sleeping on natural materials are also an important reason for their purchase. Fibers will also compress and become firmer over time compared to foam (like latex or memory foam) and foam will also provide more overall pressure relief than a fiber topper or mattress pad but can sleep warmer than fibers (natural or synthetic).
All of these options have tradeoffs and in the end your own experience will be the only way to know if a topper you choose will accomplish what you want it to but if temperature regulation is your primary goal I would tend to lean towards natural fibers such as wool. If pressure relief is your primary goal then I would lean towards a foam topper (either memory foam or latex or even a high quality polyfoam if cost is the primary issue). There is more about mattress pads such as the ones you are considering in post #10 here and there is more about toppers in post #2 here and the topper guidelines in post #8 here that it also links to.
The first step though that I would consider would be first doing nothing (if possible) for a few weeks and also contacting your VI-Spring dealer about a different firmness level (or any other options that they may have available).
If you do choose to go in the direction of a topper that you aren’t familiar with then the return policy may also be an important part of the “value” of a purchase that you don’t have personal experience with just in case it doesn’t work out the way you hope so you can experiment with little risk.
Phoenix