I think it is subjective at this point. Unless you have both unit on hand and same time with the right combination, it is hard to give a real good evaluation based on your believe. Also, 5000 is far more superior than 3000 so you can't really draw conclusion base on 3000 because it is a totally different product. One thing for sure, newer products suppose to be better in technology but sonic wise is subjective. I currently own 6 different preamps and 5 different amps and I do find something different and something I like about each one.
5000 is more for more seductive sound. It is known for seductive musical characteristic and not for dynamic or pace or pin point imaging sharpness. The 5000 will make all music sound nice and gentle but not to the point where it become muddy or smear. That's why they choose tube retification in the power supply. It is in the class of its own. In audio, it is either you like it or you prefer something else. There is no real answer for every question about musical preference. If you can affort it, why not own both?
5000 is more for more seductive sound. It is known for seductive musical characteristic and not for dynamic or pace or pin point imaging sharpness. The 5000 will make all music sound nice and gentle but not to the point where it become muddy or smear. That's why they choose tube retification in the power supply. It is in the class of its own. In audio, it is either you like it or you prefer something else. There is no real answer for every question about musical preference. If you can affort it, why not own both?