Insignia NS-H2002 home theater

This home theater does not have a digital in, so I am not interested in it per se. But it is crazy cheap at $69. It might not be as powerful, but the my interest in it is entirely of a different sort. Suppose, one even knew that this system is prone to breaking and developing all sorts of problems. Still, wouldn't this be the case when getting an extended warranty actually be a good idea? With a product so cheap, well bellow competition, you could have it replaced if it ever broke... Insignia is a BestBuy brand, so it is probably not all that terrible after all.

DAVHDZ235 vs. Philips HTS3555

To my great dissatisfaction, it turned out that Sony Bravia DAVHDZ235 does not have a digital in. I don't know why I assumed that it would. It seems as if Philips is more digitally diligent. Their HTS3555/37 has a DTS and Dolby Digital Decoder. And the speakers are not as huge as on some other models, and the main unit is somewhat slim.
It also has a MP3 line-in and a USB port. It does upconversion to 1080i and even plays DiVx files.
BestBuy has it for $180 or something, but from the reviews (quite good, I must add) it looks like it sold for $156 at some other point.

Here is the manual to this Philips HTS3555 home theater: