buying a bass-help needed from you

[ali581011]

HELP HELP!!

hello, this is my first time on talk bass but reading your replies to funk engineer you all seem really helpful so was wondering if you could help me out...
i used to play US jazz but had it stolen, didn't play again for a couple of years then joined a band and borrowed a squier to play on and suprisingly enough really enjoyed it! i am ready to purchase my own again but not sure what to do, i have a j-retro preamp and bad ass II bridge in my possession but limited funds apart from that. these are both direct replacements for jazz so should i buy mexican bass and upgrade or can i buy squier and upgrade? if i get squier i can afford to put some SCN pickups in but if i buy MIM bass i can't. also if i got squier i would have a bass ready to play with upgrades and can save up for a better neck and schaller tuners to put on it which i assume would be better than the stock neck on the mexican. not sure what to do- help help help!
remember though initial funds are a problem and the answer i probably want to hear is "buy a squier and stick your upgrades on and you'll never need to buy another guitar again" but if thats not true then tell me. with all the uprades i've got i don't want the actual thing falling apart after 12 months but at the same time don't want to buy an expensive bass when i won't be using any hardware from it!