For what ever it's worth, I prefer the Sonic Frontiers Line 3 on every level, except for the fact that they are no longer in business. I understand service is still available, but there is something to be said about working with a firm that has been around for a long time and appears to be staying around.
Sonic Frontiers line 3 vs. AR 25 II
I'm on the verge of buying one of these pre's. There's a little price descrepancy between the SF 3 and the AR 25II. I've never even seen a Sonic Frontier's pre but have heard good things. If anyone has first hand experience with these pre's, which would you choose to mate with a Levison 334 amp, Sony SCD 777ES, and top notch DIY speakers. Thanks.