If want to replace your old DVD player, the Sony BDP-S590 is great choice. This unit not only incorporates excellent Blu-ray disc, DVD, and audio CD playback, but also provides both Ethernet and WiFi connectivity for access to an abundance of audio/video streaming content from Netflix, Pandora, Hulu Plus, as well as content stored on network-connected PCs. Two USB ports also allow access to media content stored on USB flash drives. In addition, if you have a 3D TV, the BDP-S590 is 3D compatible.
For additional suggestions, check out my current list of Blu-ray Disc Players.