Hi wolfav
Yes, the DBS3000 is the only Triple Dragon presently available. I've had mine for over a year, in daily use with no problems, which owes something to the excellent build qualities of the receiver (runs very cool as there is loads of ventilation space inside).
As with any Linux - based receiver, setting up requires a certain amount of patience in communicating with your PC (a definite necessity to get the most out of the TD), but plenty of help is available on various TD sites.
Channel changing is reasonably fast: an idiosyncrasy with the TD is that, when changing channels, sometimes there is a little pixellation before the chosen channel resolves. For some reason I rather like that instead of a blank screen!
I don't do CS, but I've set it up as a client to work with my S*Y card.
If you do consider buying a TD, have a read of the guides in this section, any help you require in setting up, just ask away!
Llew