what i'm saying is, if you want a super strat, you NEED to have one with a good trem, or you might as well not bother. I found out this the hard way. Luckily, my two super strats' cavities will fit a Gotoh/OFR/Schaller, but the studs are too small, so I'm going to have to get them drilled out.
the only way to tell for sure is to get the measurements of a good trem (
www.floydrose.com, or email schaller, or wdmusicproducts.co.uk about the gotoh), and then measure the guitar. Also, it's a false ecomnomy, because odds are you can get a guitar with a good trem cheaper than a guitar with poor trem plus the cost of a decent trem (and the guitar with the good trem is probably a better guitar too!).
I don't see why you couldn't get a second hand super strat with a good trem for around £200, when the ibanez s470 and washburn x40 pro go for about £350 new. But if you can't, I advise to try to calm down your GAS (I know it's hard, lol, i have GAS too!) till you can get £350 together.