Simaudio P8/W8 or Latest 740P/860A????

Want to upgrade my Simaudio 700I to separates. I can go for NOS Simaudio P8/W8 or their newest 740P/860A for the same price. The P8/W8 has now been discontinued but may be a better value and provide better listening than the second combination. I have not had a chance to audition the P8/W8 as the dealer with them is 1000 miles away. I own Dynaudio C2S' and would like to get the best bang for the buck. Could anyone that has owned either of the above please give me their impression and opinions. I cannot afford to jump to their 850P. My main source is their 750D.