Daryl,
   I haven't actually seen or used either so I'm basing this on the pictures they have.  I prefer the one with the mid-span arrow support because that helps keep the arrow square to the blade.  You can adjust the vise to get the other direction set, but the up and down direction needs a level guide to feed the arrow in.

David

David,
Thanks.  That makes great sense.  These are a neat idea!

Daryl

I'm having a hard time finding the saw with an aluminum base on ****.Any help would be appreciated,Thanks Greg.

Greg,

I sent you an e-mail with one possibility.  Hopes it helps.

Daryl

Daryl that did the trick I put a bid on one,Thank You Greg.