I have had no trouble so far with my main desktop, I just want to be more cautious as my balance grows. I kind of look at it as my real $$ wallet has never been stolen off my nightstand, but that doesn't mean I would keep $1,000's of dollar in there, I would put larger sums in a safe or bank.
I am not sure about paper wallets, but for now I am thinking the dedicated laptop will be fine. I do not plan to use it other than when I would need to transfer the coins. It is old but functional, and I plan to buy a new SSD, so everything should be clean from the start.
But again, there are other people, who can answer that question better than me.
The main reason for a new SSD, other than to be sure it is clean (no virus, root kit, etc), is because the current HD is an older spinning disk and is very slow. Its space is also very limited. I can get a new 256 GB for around $100 so I am not too concerned. Plus this way it should be a bit more reliable going forward.
You bring up a good point about backup. Can I just back the wallet up to a USB stick, or maybe a couple? What are the best options and recommendations?
Thanks!