Seems like a lot of votes for Electrum. What's the benefit to Bitcoin Core? What resources does it take to host a node? Could you use an external hard drive for your wallet? Would that improve security as it can easily be taken offline?
Yes, generally running core on a separate hard drive is more secure as it can be taken offline. However one risk is that the hard drive may fail. You can also use a paper wallet for cold storage and a normal wallet for your hot funds.