Opinions aside... Didn't have time the other day to add info as to where you can get boxed set DVDs of popular TV series - they're originals but at lower prices than HMV, etc - take a look inside a DVD/Blu-ray shop that calls itself æ£ ('Jing'), which means 'authentic' or 'original' (at/around no.32 Mong Kok Rd, off Fa Yuen St; open till 12midnight).
Not too long ago, saw Desperate Housewives, Supernatural (super series!), CSI, Bones, Criminal Minds, House, Gray's Anatomy, Nip/Tuck, Gossip Girl, Modern Family, Fringe, so on, on their shelves near the cashier's. They don't have many new/latest series, unfortunately, so maybe search online and download 'em.
Also look into a DVD/electronic chainstore called Cheapy. In Mong Kok, there's one around no.1 Sai Yeung Choi St South, near Dundas St end.