A pod is like a tea-bag. The other machines make their drinks with a capsule, either aluminium (Nespresso) or plastic (Tassimo, Dolce Gusto etc..).
As far as i know, the Dolce Gusto is the best at making a real variety of drinks from coffee to chocolate. As mentioned, their coffee isnt rated the highest, but by far from the worst. The capsules are however a large plastic lump, and are expensive.
If you wanted a coffee only 'capsule' machine, then Nespresso have come out best in consumer reports for the quality of their coffee, its just the capsules for the moment are aluminium..also not good for the environment and are expensive for you the consumer..also only available through their online store.
If you are the only one to drink coffee, personally i would use a Bodum or a stove-top for you (and any guests) and either the microwave or a pan of milk for your missus..
just my 2p…