Best coffee espresso maker, is first and foremost something that would saves you money. Then, it is also something that would add value to your coffee experience.
Why would one be looking for the best coffee espresso maker, when the coffee round the corner is so good and the cuppa from Starbucks is not too bad either. What is the need for looking for a best coffee makers right?
I guess after some time (maybe years later), anyone would figure out that the money spent on the coffee "round that corner" can buy you gourmet coffee from espresso machine many times over.
At approximately $4 per cuppa, multiply it for 365 days and you would be spending close to $1500 on coffee! A good espresso machine would probably cost you about $500, even if you factor in the beans, you probably still saves a couple of hundreds.
Now, do you see the logic behind the folks that are looking for the best coffee espresso maker? What do we need to look out for in finding that "best"? There are a few things that you can consider, but the most important is the pressure.
Oh, if you are interested in the espresso machine that cost $500, it would be the Saeco Odea, makes great espresso and cappuccino easily.
The lower cost espresso machine are usually those steam driven machine, they are great if you are not particular on the taste of the espresso. Personally, I feel that the steam driven machine quality still cannot matches those at starbucks.
To be Your best, it has to brew espresso and cappuccino better than those at starbucks or at least equal them in terms of quality.
And to achieve that, it would have to be a pump driven espresso machine. This machine heats water in their internal tank, then they are force through coffee grounds, at 15 atmospheres.
At this pressure, the grounds are totally infused with the water (and that is the reason that the coffee ground has to be packed tightly) to produce the dark, rich, aromatic espresso.
Other things that might be relevant to your best coffee espresso maker search might be the look of the machine, the value (not the price, but what the price can gives you in terms of quality and experience) and the ease of use.
However, all those criteria are personal preferences and that is really what "best" meant. It has to be something that fits snugly into your lifestyle. Just remember that when you found your best coffee espresso maker, do give it some "pressure" test to make sure that it can deliver...:)