Fastest XML Editor/Viewer

I use Visual Studio every day for just about all of my development tasks. However, I attempted to open a large xml file (> 20 megs) and Visual studio spiked up to 1.5 gigs of memory consumption and I couldn't do anything... My old standby notepad++ (great editor!) also hung on opening the file. A quick search yielded First Object's XML Editor. Worked great. Super fast.