Glad early signs are encouraging. On the reliability front had to send mine back for replacement - had increasing burning smell (probably your worst fear). That said it was there at the beginning and I haven't seen other reports so may be a lemon. Replacement sent out yesterday so we'll see if the issue is localized. Surprisingly really kinda missed it at work while it was gone. I can only play PCM? WTH? The GO720 seems to be hitting last so I haven't seen many impressions. Some claim the GO1000 has a bit of a U-shaped signature compared to the GO450. Lots of deserving LH criticism and I'd still love to hear the Resonessence Labs Herus in comparison, but as Tyll said earlier (and Filburt referenced recently) - you can get pretty fine sound for a little cash (properly implemented and with complimentary gear) at the moment. Can't think of a better example to how different the audio world is than HeadFest 07.