The Chinese spending as a % of GDP actually dropped in 2010 compared to 2005 while 6 out of 10 increased theirs.
As far as US dominance in Asia, there is no arugment there. 32K US soldiers in Japan w/3 air bases, 14 Army, 30 some Navy ones, 30K US soldiers in S. Korea w/2 air bases, 20+ Army...