I have recently decided I had to get a Lightning wallet
Why?
What are the best wallets compatible with lightning?
It depends.
Can I use the lightning network for long term storage?
This question is what made me ask "Why" you want a LN wallet. I use my LN-wallet for small, frequent payments, which is what LN can do much cheaper than on-chain Bitcoin.
However, when you're talking about long-term storage, there's absolutely no reason to do that in an open LN-channel!