In my humble experience and based on discussions with others who have far greater listening experience than myself I would say the following, paying less than 3 grand for a balanced beta22 is one of the better "bargains" in high end audio. Granted, with your average DIY build you're not going to end up with something as visually stunning as one of Justin's amps but if great sound is what you're all about then that wouldn't matter anyway. Stephen's price is absurdly cheap.
I'm currently revamping my beta22 plans. My original thoughts were for a 6 channel balanced build but I'm now pretty sure that I won't be going down that road. The complications of case size and wasted heat and power resources are pushing me towards a 4 channel build. Decisions, decisions...