I just bought the Sony UBP-X800M2 on Black Friday for $198. Watched a few 4K movies on it. It's a nice player. It weighs about 5 pounds more than the X700 and has a metal base inside.
It offers WAV, AAC, AIFF, MP3, FLAC, MKA, M4A, CD-R, CD-RW, SACD, DVD-Audio, DVD-R, DVD+RW, DVD-RW, DVD+R, DVD-ROM, CD-ROM, DVD+R DL, BD-ROM, DVD-R DL, CD-DA.
Basically, everything you could ever ask for plus wifi that I don't use on my 4K players.