Speaker Help...

So, I'm in the market for a new pair of speakers, monitor speakers to be exact.

I tested a set of monitor speakers at a music store in the city, and I thought they were good, but the price point was shocking. Only 50 bucks.

http://tpro.com/prods.php?prod=MRS4

Now my question is, are speakers that come in a set with one active speaker, and one passive, any good? Do they produce better sound than say, Logitech speakers with a subwoofer?

What other speakers do you guys use that look similar to these? Are they active?