Sorry guys! Stupid question, please help if you feel inclined

I hope this is in the right place!
Here is what I want to do:
I would like to have one main wallet - Possibly a paper or USB wallet (I wish I had a computer that I could wipe and install linux on and never connect it online, but the amount of money involved doesn't require this drastic of measures yet)
I am looking to trade small amounts of different altcoins on different exchanges. I don't like putting all my funds on a single exchange, so the idea would be to just send the amount needed for the trade from my main wallet to the exchange in order to set up the trade, and then once the trade is completed, send the BTC back to the main wallet.
I have USB sticks, I've never used Armory before but I am leaning towards that. What is your recommendations for a situation like this?
USB wallet? 2 wallets, one hot and one on USB or Paper (and how do you not compromise the USB wallet by accessing it)
What would be the best way to store my bitcoins in person, so I have complete control, yet I still have ease of access without screwing up my security.
I have 2 laptops, I recently wiped one laptop from windows to Linux mint. It is online though, but I was only going to use this computer for BTC, is that wise or should I be using my brand new windows 8 lappy? I hear everyone talking trash about Windows is why I ask.
Thank you very much for your time