I was looking into a Rogue 66 when I had the BP-25(newer verison and psupply, all balanced IC's) and a 4B-ST. I just did not get the comments I was looking for when asking sellers here (AG) how they liked the 66. At the price, the 99 seems pricey, and the newest Rogue (cool design) seems like the best deal (read the latest review in Absolute Sound). Both that and the TAD-150 seem like a great place to start if the the Lector ZOE is too much $$.
The BP-20/25, although dead quiet, will be easily outclassed sonically in most all departments by most tube pre-amps. Do not fear losing accuracy, detail, or bass by going to a tube pre....you'll most likely only gain, the sound will go from flat/sterile 2-D to full/exciting 3-D.
It is not a question of accuracy or warmth. The argument to me is kinda like comparing regular TV to HDTV.....HDTV must not be accurate because there is information present (visual) that cannot be seen on regular TV!!!! I am NOT going back to regular TV (BP-25) after seeing HDTV (Lector ZOE); no matter what the argument.