Nabil98, I note your post doesn't identify your preferred music, or related components, so I can only assume that you have determined that a tube amp would be complimentary. That having been said, the 302b is a great introduction to tubes and ridiculously good for the price. I had one in my system for over a year and loved it. New production tubes for the 302 (EL34, 12aT7 & 12ax7) are very good, so tube rolling is relatively inexpensive. I have only recently upgraded to a Cary SLI-80 and honestly feel the Jolida gives you about 85% of the performance of the Cary for less than 1/3 the price (new). I used the 302 with Soliloquy 5.0 monitors that are 89db efficient and had plenty of volume in an 11 X 20 room. I found that upgrading the power cord (VH Audio Flavor 4) greatly improved the peformance.
Good Luck!
Good Luck!