I think that really depends on the collection you currently have. If you don't own very much then you have to go with LOTF simply because you are going to get 84 minis vs 42. Legacy also only contains arguably one bad R/VR in Moff Veed. All the other ones are very playable. IMHO the commons and uncommons in Legacy are vastly superior to FU as well. If it were me, I would buy some singles out of each at Auggies (
http://store02.prostores.com/servlet/au ... s+Mini%27s ) and then spend all my money on KOTOR
...but then I have a sickness.
Since we are talking about you, I would buy LOTF and cherry pick some singles from Auggies or use the extra 42 minis for trade help to get some of the guys you are wanting from FU.