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Also if you use the camera often, then you should avoid the cyanogenmod9 rom. the stock ICS camera cannot compare to HTC's stock camera app; photos are noticeably blurry on cm9, but crsip and sharp on stock htc camera, despite any changes to camera settings. Otherwise, cm9 is probably a quick beast and you will love it.
I also graduated yesterday from the Triumph. For me the Triumph was a no-brainer to too root in a desperate attempt to fix the GPS and the jerky video. All roms I tried failed to do this - hence the purchase of the EVO.
The Wimax is outstanding - I went from minimal 3g on the Triumph to full 4g on the EVO. I can regularly hit 9 meg download speeds. No more annoying 20 minute waits while the app store attempts to update 12 apps at 0.2 meg download speeds

So far, Im not seeing a compelling reason to root/rom as the only thing I would like is 'Google Now' (Siri). Im not sure its worth the risk of rooting etc just for that. My radio seems fine - so far (Sprint Branded).
Everything else seems to be great on the phone. The 3D is a total gimmick but my daughter had fun taking pics of the dog. Is their a desktop app so that you can view the 3D pics other than on the phone?
Thanks all.
HTC EVO Speedtest: