Thunar is an excellent replacement to Nautilus on Linux, because it operates at reasonable speeds on a modern PC.
In September 2009, I started work on a modification of Thunar (http://bugzilla.xfce.org/show_bug.cgi?id=6412), entitled "Thunar Preferences Traditional", which provides Thunar with those additional power user features missing from Linux file browsers (http://live.gnome.org/Nautilus/Ideas/Power%20users), but present in the original generation of Windows based file browsers;
|Thunar Power User Preferences Dialog Box|
|show full path in title bar|
|location bar on separate line|
Update 20 Sept 2011:
The Thunar Power User Edition has recently been compiled for EL6. I have uploaded the RPMs, source, and patches for both Thunar-0.9.0 (EL5) and Thunar-1.3.0 (EL6). They are based upon Thunar-0.9.0-2.el5.centos.src.rpm (EL5) and Thunar-1.3.0-4.el6.src.rpm (EL6) respectively. NB the "EL6-withHomeButton" specific version displays the home button at all times, even when the "remove lower priority toolbar buttons" option is selected.
Thunar with Traditional Preferences for EL5