I'm in the market for a general purpose JTAG tool. Immediate use is for Analog Devices ADSP-BF525, but will likely end up using it on a variety of ARM parts and maybe AVR32. No immediate need for the SWV support, but it might be nice down the road.
On SEEED's site, there is a note "most users will be better off with Bus Blaster v3". Is there a downside to buying the v4 other than the additional $10 price? Thanks! -Ian-