As your computer can handle 64-bits, you might want to try Fatdog64-600b1,
http://murga-linux.com/puppy/viewtopic.php?t=79001 or Lighthouse 64 5.14.2 Beta 4,
http://murga-linux.com/puppy/viewtopic.php?t=74572. Although Fatdog is newer, I prefer Lighthouse which handles more like other Puplets.
Despite that my computer can run a 64-bit OS, and I think jemimah's Saluki,
http://murga-linux.com/puppy/viewtopic.php?t=73687 is the most innovative and provides the best vehicle for customization, until recently Lupu 5.28.005,
http://www.murga-linux.com/puppy/viewto ... 054#622054, has been the OS I regularly used. Over the last few weeks, however, I find myself choosing to boot into one of the Precise Puppies for several reasons. (a) I haven't found a Lupu pet which it wouldn't run; (b) it appears to run faster than Lupu, perhaps because its newer kernel can make better use of my hardware; and (c) being based on Ubuntu binaries, I've been able to install a couple of apps from Ubuntu's repos when pets weren't available.
The foregoing should not be taken as a criticism of either Exprimo,
http://murga-linux.com/puppy/viewtopic.php?t=76247 or slacko 5.33 Final,
http://murga-linux.com/puppy/viewtopic.php?t=76279 or Slacko- next cycle -alpha,
http://murga-linux.com/puppy/viewtopic.php?t=80180. Each is a really great OS. It's just that I think I understand working with Ubuntu binaries better, and so gravitate to the Puplets which use them.
Despite the "beta" designation of Fatdog64 and Lighthouse64, both are seasoned OSes. And the Precises, although expected to have some rough edges, have been fully functional.
You can usually find which kernel is used on the first page of the thread of a Puppy's development.
But the best advice I can give you is to burn a couple of CD's and find out for yourself which Puplet works best with your computer, your objectives, and the way you operate.
mikesLr