i tried a rogue 99 magnum-upgraded preamp, & found it very coloured, & w/poor bass response. to be fair, impedence may have been a problem, as this product has gotten great feedback; not *all* of ya are deaf! ;~) i also dint like not having a balance control & not having a tape-loop.
the cary slp98 replaced the rogue & was a wry nice unit - much less coloured, excellent bass response, but still kept that tube liquidity & soundstage depth. i'd have kept it, but i found a used melos music director (updated ma-333), that i yust *had* to try, based upon my recollection of a melos sha-gold preamp that i'd heard a few years back. well, the melos is absolutely fantastic, an order of magnitude better in all areas, & a steal at the prices found on the used market - usually <$2k for the linestage. i honestly believe that this unit competes w/anything currently awailable.
regards, doug