Well you sure chose to start with strong books. I am actually only a few pages from finishing the Night Angel Trilogy and have really enjoyed them. Hobb for me is a rare delight and have a hard time finding many books up to par with her Farseer books. I would recommend Scott Lynch, even though it is not as much assassin as con men. He has that real feeling to them and as long as you don't mind characters dropping the "F" bomb every few pages (which you shouldnt after reading Brent Weeks) you should enjoy.
Of course, like everyone else on here, I would also recommend trying Joe Ambercrombie...one of the most enjoyable new series I have read in a long time.
On the note of new authors, my favorite new author is Brandon Sanderson. I read Elantris, the Mistborn series and Warbreaker and loved every second of them
Good luck, I know based on recommendations from this site, I will never finish my TBR pile!