I recently embarked on upgrading my Lp12.I was running a pre-cirkus lp12 with a Roksan Nima/At 33ev/mose/naim stagline(rest of system olive naim) I then recently picked up a nearly new Dynavector 20x2 for a very low price and could not believe how great this cartridge sounded, though I knew it could be improved upon. I had purchased earlier in the year a nearly new cirkus bearing though I was not sure what direction I wanted to go in regards to the sub chassis without breaking the bank. I stumbled upon the Stack Audio website and their Serene sub chassis and I would like to recommend it to anyone looking for a relatively inexpensive upgrade. The construction and finish is top notch and Theo was a pleasure to deal with answering any questions that I had and on top of that mailed the item on a Wednesday and I received it the following day, not bad from the uk to new york and shipping was free of charge.