I am not that well versed with the brands. From whatever little that I have noticed, It is rare to see sensitive speakers in book shelf form. Apart from the DIY Boston Speakers (Philips Hi-Q thread), Ahuja FR thread and FM
@Hari Iyer 's OB thread, I have not seen any affordable hi sensitive speakers in
affordable range. You may see 91db sensitive speakers as part of HT packages but these generally do not do well in refined bass but are good enough for hybrid tube amps.
The best review that I have read here in the forum is for the
@viren bakhshi's stand mounted bookshelves. Please check
that thread as well. This would mean that you are looking at a budget around 1 lac (speakers + tube amps + proper cables).
I myself own a Dared DV-6C which is a tube based multi channel amplifier. They do awesome job when listening in a smaller room with less sensitive speakers (My Tannoys sensys DC2 range around 88db sensitivity). However, in a bigger room (18' X 12'), they were not able to provide the head room needed for various transient phases of music/movies. Please do not go for hybrid amps for the sake of tubes. It is important to have adequate amplification power to get the best out of any speakers. If I had sensitive speakers like Virenji's bookshelves or Rethm Bhaavas, I would have had a better experience.
If you are on a tight budget, go for Digital amps (power at great value for money) and introduce a tube buffer as Yogibear suggested. It is easier to hit the satisfaction plateau in SS amplifiers at a budget as compared to the tubes. If you want to travel the tube journey, save up funds and go for a bigger budget to get a proper set up. Please evaluate your finances and choose wisely.