Looking at only those two tables, I'd say go for the RP3.
If it were me, I'd look for a used P3-24 with the TTPSU. As Kbarkamian said, it's a great upgrade and I have no doubt you could get a mint used P3-24/TTPSU combo for the same money as either the RP3 or Expression III new.
If it were me, I'd look for a used P3-24 with the TTPSU. As Kbarkamian said, it's a great upgrade and I have no doubt you could get a mint used P3-24/TTPSU combo for the same money as either the RP3 or Expression III new.