Hi Vivek
There's a friend here in Bangalore who has used Vifa drivers and active crossovers, uses chip amps and he has a very nice system. IIRC, he uses Peerless drivers for the LF.
If you want, we can fix up a time to go over to his place and audition his system and he will answer your questions.Let me know a day and we can take it forward from there. I am not free this weekend, and will be out for town next weekend and this friend goes off to Australia for a longish contract in October when I am also not in town.So it has to be this week or next week on a weekday evening.
George