Watch the E Chords online guitar lesson by Rich Maloof from Acoustic Guitar For Beginners
The E chord has a deep, bold sound on acoustic guitar.
The progression of D to A to E has a familiar sound. What's not so familiar, though, is having to completely re-configure your fingers for each chord - no easy added or lifted fingers in this progression.
Also note that the bass notes fall on the 4th, 5th and 6th strings, respectively. Once you get comfortable making the chord shapes with your left hand, you'll want to make sure you're strumming from the "correct" lowest string each time.