Not only does it have ABS, but it also has ASR (traction control), ESP and EBD if you need them
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Imports lose value at a similar rate, but remember you paid less in the first place! They are specced the same (apart from alarm which is a dealer fit thing in the UK) and are impossible to tell from non-imports without checking stuff out. Mine says nothing to give it away (even on the V5).
Also remember that a good proportion of 172s are imports these days due to the savings to be had. My dealer said to me that they hardly sell any 172s in there because everyone gets them on import. Yes the UK one might be worth more in 3 years but it cost £14500 as opposed to £11699 (using trade sales price for example). My mum and dads Golf GT TDi thing was an import and theyve just traded it in, and got £500 knocked off because it was an import - not bad considering they saved £4500 in the first place!!
Good luck!