I use a "La Marzocco" espresso machine at the coffeehouse I work at and my former manager told us to leave the portafilter’s on the machine after we pull a shot. Is this proper? She said it had something to do with pressure?

I’ve been looking for a cheap, entry-level, espresso machine.
So far, I have found the following three:

1: Mr. Coffee ECM160 4-Cup Steam Espresso Machine

http://www.amazon.com/gp/product/B000U6BSI2?ie=UTF8&tag=cvwakib-20&linkCode=as2&camp=1789&creative=9325&creativeASIN=B000U6BSI2

2: Mr. Coffee ECM250 4-Cup Espresso/Cappuccino Maker

http://www.amazon.com/Mr-Coffee-ECM250-Espresso-Cappuccino/dp/B001KBY9E6/ref=pd_sbs_k_4

3: Capresso 303.01 4-Cup Espresso and Cappuccino Machine

http://www.amazon.com/gp/product/B001QTVXCI?ie=UTF8&tag=cvwakib-20&linkCode=as2&camp=1789&creative=9325&creativeASIN=B001QTVXCI

Which one do you think is best? If you know of any other ones that are under 0 please tell me.

EDIT: I will be using this just abut every morning.

Im looking to buy an espresso machine/maker, but there are SO MANY on the market that its so hard to decide on one.
Im looking for one that is convenient, easy and fast to use, ive seen many capsules type but wondering if the capsules are expensive? and what if i like to try different coffee (like starbucks or a foreign type)

please share your experience with me….

thanks a lot in advance

The valve is required on the steam wand of an espresso machine. It is to open and close after being switched on and throttle steam coming from a boiler without reducing the pressure in the boiler significantly.

I saw at a Friend’s house an espresso machine that uses ground coffee. The brand is called Delongui, which machine is it, does anyone knows?

There was one from Sims on a Stick that would fulfill all of you needs. Since this site has closed, is there another where it can be downloaded?
This is for the Sims game. I’m not looking for a real espresso machine…

An original web series that profiles individuals who have the amazing ability to stand out and create something passionately original. Their drive and expertise often reinvigorates something familiar into a newly minted phenomenon. We begin at Intelligentsia Coffee in Venice, California over an espresso shot, a syphon pot and a cappuccino. Episode 1: Espresso www.youtube.com Episode 2: Syphon Coffee www.youtube.com

I am hoping to spend 0- 200. Some brands I have seen on eBay: DeLonghi, Nespresso, Krups, Gaggia, and Mr. Coffee.
Please help! This is an anniversary gift for my husband.
Starbucks Barista Espresso Machine?

I am going to be a freshman in college this fall and my parents got me the Nespresso Pixie espresso machine. On the housing website, espresso and coffee machines are not on the list of things not to bring, however it does say not to bring "food preparation machines". I wouldn’t really consider an espresso machine a food preparation machine, but just to be safe, are espresso machines generally allowed in dorm rooms?

I have a Mr. Coffee 4 cup maker. I don’t have instructions, it was passed down to me by a friend and he lost them.
It’s an espresso machine by Mr. Coffee.

I found the manual online. Thanks anyways.