I really like the Arizer Extreme Q , you can chose to use bag or whip , fairly discret looking comes with an aroma bowl for essential oil.
Poratable I am looking to get the pinnacle pro with PonG (Plastic on Glass) adapter and a micro bubbler as my puffit has bitten the dust from excessive use.You can use dry herbs and oils in the pinnacle pro .
For just oils then the Maud-dib form magic flight has some great reports and can also be used with micro bubbler. Can't say I used this one but intend to if i get round to making some wax or shatter.