Only RC Buford or George Shinn could tell you what it would take to get either guy. My feelings are that Parker would be easier to get, but none of us have anything but our uninformed opinions.
The Spurs just signed Splitter (for a RIDICULOUSLY low sum), who is basically Brook Lopez with an edge. They're gearing up for one final push. The only way either of those guys gets traded is for each other.
Ugh, I forgot the Spurs got Tiago Splitter. Jesus. Well maybe there is a trade in the future. For the record I don't want Parker. I wouldn't turn him down if given away, but I sure as hell wouldn't gut the team for him. Even Batum seems a bit steep as I feel our identity MUST be a defensive one after this summer.