Hey Sam and Navin taken down all the suggestions... printing them and will take it to the person who's going to install it... will buy the stuffs personally...
Reason for two diff company subs was the availability... a lot of money has been actually put to do the Sierra up so taking all possible products from Indian market Section on the forum (i trust Teambhp and my friend trusts me ) He already had a JBL Basstube, picked up a sub from manson, has a decent Poineer headunit and 222 Sony amp. rear and front speakers were again taken from Team-bhp, just bought the Infinity amp from Dxb and everything is lying around waiting to be fitted.. Lots of barter happening with products, 12 cd changer lying with one more head unit... so a good stock lols should put everything up for sale kidding.
Now the lastest update is that The cassette player Picked up from manson has been taken by a close friend after a lot of begging (somebody stole his system) so given away... now will be after Sam life to get his BIL's Headunit and 12 cd changer.. just getting the finance available

so that i could rouble him after that.
Answer to Navin's Questions:
a) reason for using both subs is
i)enuff boot space, ii) want Boom-tizz-boom
b) Budget might go up and down, its just availability of products and moood.
c) refer to answer a-ii
d) Nappy friends car - i drive sometimes
e) will have to see that dont know...
All Setups and queries are for a friend who is restoring his Tata Sierra.
For me it is:i am not an Actor i am not a star and i dont even have my Own car

. Thanx for all the help Navin and Sam and Team BHP