I know you can use blockchain.info but how many wallets have an 'import private key' option so you can transfer your entire paper wallet balance to an online or desktop based wallet?
I'm just preparing for the future because blockchain.info can't be the only option incase it ever goes down.
You can import private keys to all those common wallets like Bitcoin Core, Electrum, MultiBit and Armory. So you shouldn't need to worry about that.