Hi, I have some really old speakers Phillips DH415 that were
gathering dust. I want to re-purpose them and use them with my
TV/computer - i got to buy an Amplifier for them.

(here's an image: subwoofer+bass reflex+tweeter is what i suspect)
http://imgur.com/a/Mt9Hw

I can't figure out what rating amp to buy.

If that's 20W PMPO x 2-speakers, then I need to buy: 30W RMS amp?
That seems like not a lot of power and I don't remember this set
being very loud. So is my assumption correct?

Are there any modern features I could look for in an amp. My TV is a
Samsung 4003 720p and it has Component Ports for audio/video.