I have been offered to buy a Sonosax SX-R4 at a good price. I presume that the preamps will be wonderful. I have two Sonosax SX42 mixers, and much prefer their preamps to the ones in my Sound Devices 744t. I am bit concerned about recording on a hard drive with moveable parts (the SX-R4 only records two channels onto an CF-card), but reckon I can put in an SSD. How about the A-D converters? Considering that it's a machine from 2003? And are there any quirks I should be aware of? The later model, SX-R4+, seems much lauded on this forum. But at the moment, I can't afford it. Many thanks!