Duo's is the way to go. Also keep in mind that alot of TG-CD units have been getting the "I am F##### gear" issues lately. Once the tiny little gear goes out your done! Just ask Zeon, I think he has like 3 of these units.
Cap issues aren't difficult to overcome, best world is the Duo-R (the X is the same thing but with a controller that hikes up the price). Clean looking system, no cap issues, only problem is the coloring sometimes.
BTW - I might have a JP Turbo Duo for sale. I could even have it region modded if needed and was planning to be proactive and replace the caps in the pre-amp area and give it the full makeover.
PM me for details.