I purchased my SDR-1000 twelve years ago in 2003 just after they were announced. I assembled the pieces, including the 100W transmitter, in the metal box supplied. I use an M-Audio sound card. My computer is currently a Lenovo Pentium 4 desktop running XP. The only difficulty I encountered was RF feedback from the transmitter which I fixed by putting ferrite sleeves around all of the cables. This has been a super radio. Outstanding rejection of adjacent channels through the use of digital "brick wall" filters. The SDR-1000 receiver is very sensitive compared to an ICOM IC-728 or IC-707.
While newer Flex Radios get rid of a lot of cables, I am sticking with my SDR-1000 as it is a great rig despite its age.
Purchased this radio in 2006 and have used it almost every day since. The evolution of the software has been absolutely amazing. With each iteration it's like getting a new radio. It takes a certain type of ham to want a radio like this. Even today some hams refuse to get used to a radio that has no knobs. Setting up the radio is quite involved but is totally worth it. The transmit audio is superb. I constantly receive unsolicited compliments on the audio quality. Be advised that this radio will not work with the newest computers as it requires a parallel port and works best with Windows XP. There is a parallel to USB adapter that requires XP or Vista but these are difficult to find. If you come across one with all cables and the required sound card at a good price and you like to tinker and experiment then give it a try. This radio is the most fun of any radio I've owned.