Well, I found a used but in great shape PC Engine Duo on ebay (I like the Turbo Duo look, even if the R/Rx are beefier) and purchased it. Wouldn't you know it... 2 days later a PCE Duo with the caps replaced comes up for sale on here for about $15 less, shipped. Good things must truely come to those who wait. Oh well
However, now that I'll have the ability to play Super CDs, I purchased the US Dragon Slayer as well. Can't wait for it all to arrive so I can play a game I yearned for as a kid. The Ys series, and Cosmic Fantasy 2 will soon follow (Double Dungeons will have to wait).
Thanks for all the help guys!