The problems/maintenance and shape of the 993s that may be on the market might scare me away...but then again I do find myself gawking more at a 993 vs a 996 lately(and I am a 996 fan).
A 993 Cab passed by my home just days ago and I was frozen for a moment by both the site and sound of it.
Hell with your collection it does not sound like maintenance would be a problem for you...go for the 993
check it out...
http://cgi.ebay.com/ebaymotors/1995-PORSCHE-911-CABRIOLET-CONVERTBLE-28k-PERFECT_W0QQitemZ270123585597QQihZ017QQcategoryZ10 156QQrdZ1QQcmdZViewItem#ebayphotohosting