I dont think SFAE is worth it unless you planning on playing online.
You said the first TR, are you talking about the PS1 game? Is taht even worth anything ?
TR Legend is not bad. It is pretty easy as far as Tomb Raiders go. The levels are way less complex then the first Tomb Raider or Anniversary. Graphically the game came out early this gen so it does look a bit dated but its still enjoyable overall. Legend and Underworl make one completey story arc, and Underworld is also good, but its more classic, the levels are larger and way more complex.