I just like to play around with plenty wallets. I like Electrum as well as Armory and I had no problems with Armory itself. The machine I used for testing was just very slow (single core 1Ghz/1GB ram) so it took a few days to sync and a few days to build the database.
Did you install armory on a second computer? Whats the difference between this and having it on your daily use computer if the security is so good?
It will not get any data when you are offline, but in order to check your balance you dont even need your wallet file. Just write (or copy paste) your bitcoin address and create a link for a blockchain explorer. E.g.:
https://www.blocktrail.com/BTC/address/18WgDVuiGY4A4mB8YEmVggEfSmFUUKxDcJthere are plenty explorers like this and since the blockchain is publicly available you can check your balance at any time from any machine as long as you know the address. Make a bookmark, memorize it if you want.
In my electrum wallet, I am using a few different addresses, so if I am going to check that my coins are in my wallet and not wanting to plug in my external hardware to my computer, I would need to check upon a few different addresses. Is there any good and simple way to do this on with a when having a few addresses? Also, do you recomend to use one address only once? And does electrum generate new addresses or how does it work? I can't notice that one my self because I don't really keep a track of the address strings.
Not necessary the way you described it would be semi-cold. You have a wallet that has the private keys and when you want to spend bitcoin it is online (hot), but most of the time you keep your wallet offline (cold) and check in from time to time, but you do so without using your wallet. Its not proper cold storrage as that usually implys that the machine storring your private keys is never online. It could be a old machine sitting in a corner, turned off. When you want to spend coins you create a transaction with your regular wallet (hot) on your main machine thats online and daily used. This machine however can only create an unsigned transaction as it has no access to the private keys. It only knows which addresses you have private keys for somewhere else and monitors them for you. You would then copy that unsigned transaction to the offline machine, get it signed and copy it back to the online machine to broadcast it to the network.
Your semi cold version offers a little less security, but you also only need a single machine, with an external storrage for the wallet file. The external storrage could e.g. be an USB stick that you use for your wallet file only and keep it in a safe place.
I do understand the first few lines but when it comes to the part where you mention When you want to spend coins you create.. can you please explain this a bit more? And the trezor wallet, it does all this work right?
Do you have paperwallets? It seems like a bit of more work, but do they expire? Because I don't understand what you meant by that 60 day thing. Are the private keys just on a paper? But what is the actual wallet, because the coins must be on a wallet, but without the private keys, right? And when you want to use the wallet, you need to type in the private keys you have on your printed paper right? I think I am wrong on this one, not sure.