i´m thinking that on my next travel to US i´m going to buy pickups, bridge and misc. items for my MIM Jazz instead of buying a new Bass... i think that´s a great idea because i´m on a budget and buying a brand new bass wil result me in a mediocre $400 - $500 bass (and too many problems bringing it down to mexico

)... instead i´m going to get a totally modified MIM Jazz with cool pickups and beautiful tone.
i already read the bassplayer mag. J Pup shootdown...
http://www.bassplayer.com/z1999/9903/pickups.shtml
made my list:
-Aero instrument MP-181 ($150)
-Bartolini 9k#1 and 9w4j ($150 and $163)
-Basslines SJB-2 Hot ($150)
-Di Marzio Model J and Ultra Jazz DP149 ($129 and $120)
-Fender Custom Shop 60´s Jazz Bass ($160 and got 4.5 of 5)
-Lane Poor Jazz Classic ($225)
-Lindy Fralin Jazz Bass ($160)
so which is YOUR choice and opinions (very welcome

)
some questions: Please reply
1.- when you buy pickups for a jazz....do you buy two? or just one? i saw some prices (like Basslines SJB-2 Hot for $150 list. does this mean the price of ONE pickup?)
2.-Should I buy two pickups from the same brand and model?
3.- Can I buy a pickup by X brand and buy another from Y Brand and make them work togheter??) If it´s possible... which mix up would be great?
4.- is it true that I can buy a Gotoh 201 bridge and easily put it in my MIM Jazz with no problems??
5.-is that true also for the 206 Gotoh model?
6.-are Bad Ass bridges hard to install?
ok those are my main questions... i would apreciate all replies