I would not spend the money. I purchased a JD100 and upgraded the tubes to NOS. The Jolida is the bargain of the century. Any (in any!) increase in sound quality would be so minimal that it's not money well spent. The tube sound is better than that of so many other CD players I have owned or auditioned, including players up to $8,000. But if you love your toys like I do, spend the money just to have a new toy, but musically it won't top the Jolida.
