In the short 5 months I have been using Poser on the Mac, I have seen 3 new utilities announced, more will follow. This is very encouraging.
With any new System it takes time to create or move software to that platform. I know there are on-going plans from myself and other developers to add additional utilities to the Poser fold.
With Microsofts new OS, Longhorn just around the corner, is now the best time to buy another Windows box? This new OS has major changes under the hood, it will require yet another replacement of your hardware and rewrites of all your favourite software. As a developer I see the Windows platform becoming increasingly fragmented and hard to develop for, with users running all manner of versions and hardware drivers, most of which are out of date and unsupported.

To answer the question concerning peripherals, then YES in all likely hood these would plug straight into the new Macs. Apple now uses the standard, modern protocols and is fully plug compatible. If it won't work on your new Apple then in all likely hood won't work on your new PC either.

In the last 5 years Apple has made huge changes to every aspect of their business. Their prices, the new products and OS X are astounding. They are now worth taking a very serious look at. I've been in the computer industry since 1982 and I have seen many many changes, I don't say this lightly.