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Gaggia classic has a similar construction to the ever-reliable, easy-to-repair-yourself Rancilio Silvia, which you could also consider.
I have a Silvia at home and an ECM Technica at the shop....
The ECM doesn't make better coffee than the Silvia - but it's a lot easier to use, especially for milk frothing. Small boiler machines are not too great for milky drinks.
If you only want to use the machine for espresso and the odd cappuccino or macchiato then small machine is fine.
Don't forget that
1) Fresh-roasted beans are essential
2) A good grinder is crucial.
3) You will need a better tamper than the one that comes with the machine.For beginners you can get ones that click at the right pressure.
4) The learning process is a long one but persevere and you will get there.