If they make a trade for a big in season, more and more I'm coming to believe it's going to be for a third big, one that would enable Splitter to start in perpetuity, without the fear of having no rim protection off the bench.
That would be fine, because Splitter is clearly a second big. I always felt Splitter would be a nice fit next to Duncan anyway, but with Duncan playing less in the low post and with his improved mid range jumper, there's no doubt in my mind they can excel together offensively. Basically, Splitter can be the center the majority of the time offensively and defensively, he can be the full time power forward.
Even if they'd prefer a starting big, it's going to be extremely difficult to trade for one better than Splitter. If they found a way to acquire Thompson or Davis or whoever, I wouldn't start either. I'd have them be the backup center.