comparison of battery powered phono preamps


Does anyone have comparative listening experience with these battery powered phono preamplifiers - and are there others out there worth considering?

Sutherland Ph.D.
NAT signature phono
ASR Collector
F-117 Nighthawk
jfeldman
I remember a preamp from Welbourn Labs that used battery + line power at the same time.
thanks - will look at that one too - always nave been a big Nagra tape machine fan. My budget is about $3,000.