well my 1st RWD car was an XR4i which for most people would be considered a low powered car...
before this i owned some very fast 4wd turbo sierras...
...the 4i scared me
seriously, it was a very steep learning curve for letting back end come out etc... didn't take long for this to happen:
i had also been in a few near misses which could have caused much more damage (to more than just my car) and im thankfull they did not.
the saph is actually VERY controlable in a slide (much moreso than the 4i!) and even tho it has more power and will constantly spin up the rear wheels in 3rd gear (wet), it doesn't bother me very much, as its very easy to bring back in... i think its just a better set up car, and also i've got a bit of experience with RWD now...
looking back, i thoguht i could handle RWD and i jumped in feet first, i coudnt... i really coulda done with a lot more practive/learning in huge carparks etc. luckily nothing nasty happened in it, but the potential for a crash was there every time i drove it...
if you do go for a capri etc. FIND A BIG CARPARK AND DO LOTS AND LOTS OF SLIDES AND DONUTS the only way to learn how to control it if it goes, you cant just learn the theory, you need to practice, and practicing on the road is NOT safe