[Mike]

Do not allow a faulty /defective collet to taint your view of PC. This can happen to any brand of router. You can try to expand the collet bushing slightly by inserting a taper punch and lightly tapping from both ends. A collet that has been over tightened can collapse making it too snug. You will not harm it by expanding it a few thousandths. Once your bit slides freely into the bushing clean off any oil and give it a whirl. Placing a grommet or o-ring under the bit does create a thermal break, but more importantly it will allow you to quickly set your bit to the correct height in the collet. If you are generating so much heat that your motor bearings are in jeopardy something is wrong. The most likely cause: a dull cutter.

 

[Mike]

The Hitachi routers used on the show were 3-1/4 HP. Let me point out that Hitachi was sponsoring the show, so of course they supplied what the guys used. Recently PC sponsored the show so that is why the change in brands. If you are looking for a new plunge router please consider Bosch. Both the 2-1/4 & 3-1/4 HP models are top rated in independant comparison testing. 3 of the 4 moderators on this site use Bosch. This is not to say Bosch is right for everyone. Go with what feels right to you.
As far as your rusting Whiteside bit, there are many reasons that could of caused this. This brand is always the top rated, highest quality again by independant comparison testing.
If your only reason for replacing your router is variable speed control check out the aftermarket speed controllers from Sears, Rockler, Harbor Freight (The brand I have) and others. After market controllers are physically larger, and since heat is the nemises of these components should last much longer than built in units.