The minimum requirements for a DVD Player today are: should play DVD±R/RW, CD-R/RW discs; JPG, MP3, DivX and XviD format compatibility; necessary outputs; Menu, OSD and DivX subtitle handling on the local language; at least 12 months warranty; nationwide service availability.
About technical elements of each product you may ask your local retailer or other users. As opposed to the general belief price and quality are not directly proportional – with some attention, you can find reliable goods at accessible price.