At this point, luck will factor greatly into who the Spurs are able to get. If someone like Philly or the Clippers don't get the guys they are targeting, they'll be able to go after Maggette or J R Smith and offer more than the MLE.
I still think the most important thing is to get some young guys and not get shut out of free agency. If the Spurs land two non-glamorous guys like Pietrus and Delfino, then they've got the first 2 or 3 months of the season to let them fight for minutes with Hairston, Udoka, Bowen, and whoever else might be around. At the very least, they give the Spurs trade assets. And no question: Hill, Pietrus, and Delfino are all young & athletic, which almost all of us agree was the first off-season objective.