I used a plunger to make my coffee for a long time, until I spent a month house-sitting for a relative who had a Sunbeam 4820. It took a little while to get it right, but before the month was up, I was hooked. And had found this forum.
I shopped around and bought an old Gaggia Classic and MDF grinder off gumtree for less than $200. They needed a bit of TLC but were soon making coffee at least as good or better than the Sunbeam (about twice the price).
I have since had a few coffees from an Aeropress, and while it is a little better than the plunger, neither of them can match the depth of flavour in espresso, or the ability to make a really condensed shot for milk based coffees.
In reply to the question on your other post, I found this article quite helpful when I was first starting out. "www.sweetmarias.com/library/content/espresso-definition-basic-techniques"
Good Luck - DeeGee.