Benchmark Preamps and Amp - For real?

I have the HPA4 which replaced the Bryston BP26 in my system (driving the Benchmark AHB2 amp). I found the HPA4 more transparent than the BP26.
Have used the HPA4 to drive a pair of AHB2 amps in mono mode - super clarity and reveals the best in music sources. 
Had no intention to change that setup but stumbled across a good deal with some big ATC active SCM100 speakers, so now using the HPA4 to drive those directly - couldn't be happier. 
Not for people who want to use the preamp to influence the sound of sources - that's not what Benchmark are about.

I’m thinking of an AHB2 to go with my PSAudio BHK preamp. 

After having read several reviews (Stereophile, SoundStage, etc.) as well as several online discussions (such as this one), I've taken a chance and ordered an LA4 (don't use headphones). It will be driving a dbx DriveRack 4820 which in turn powers a pair of Crown K2s (below 150 Hz) and a Yamaha P7000S (above 150 Hz). Subs are the Tannoy VS218-DR; mains are the Tannoy SuperDual T300 (with custom cabinets and passive Xovers). The curious—or crazy—part of the exercise is that the LA4 will be going up against my present preamp, the Boulder 1012 which retailed, 15 years ago, for six times the current price of the LA4. Now I've gradually abandoned audiophile amplifiers for the pro amps mentioned above, and don't feel shortchanged. Now we'll see what the ears say when the little LA4 goes up against the big Boulder. . .

@dr_joe  What was the result of your comparison of the LA4 against the big Boulder?

I'm curious as well.