It took only a couple of hours after the official release for several Axim X50/v reviews to pop up:
Dell Axim X50v Pocket PC with VGA Display (PDA Buyer's Guide)
Dell Axim X50 and X50v Review (Brighthand)
Dell Axim X50 and X50v Review (BargainPDA)
Dell Axim X50: Dual Slot Goodness at a Reasonable Price (Pocket PC Thoughts)
Dell Axim X50v High (Aximsite)
Dell Axim X50 Mid (Aximsite)
Dell Axim X50 and X50v (PDA Geek.com)
Dell Axim X50v (infoSync World)
Dell Axim X50 Advanced (infoSync World)
Dell Axim X50 Standard (infoSync World)
Dell Axim X50 / X50v Pocket PC (pocketnow.com)
Skimming through all these reviews, the new Axim series evolves as a clear winner!