I am with Mr Carlin on this ...
I have run my FS (which was my upgraded SP which was originally a standard ZX5 in 2007!!!) since they came out more or less. In that time I have never had an concern about the durability of the car in fact 95% of the time even a breakage will actually hang together to finish the run and is always something that is easy / cheap to change out.
In addition the transmission is awesome, 1 diff rebuild since Xmas isn't bad going, still silky smooth now!
I am not going to say the car is perfect, no car is but the FS is so damn close you wouldn't believe it! I will admit that I have had the occassional "odd" hingepin failure but only ever at Coventry (on the car killing astro track) but otherwise all I replaced due to breakage this year was 2 front wishbones after one bad landing (Cov again) and one radio gear related full chat straight on moment! Tough as old boots but as agile as a antilope running for its life!
IF I was going to change to anything other than the Kyosho it would be the Tamiya but as the UK based support for Tamiya is near zero and I don't do internation ordering I see no reason to change, to be honest ... even if the Tamiya car was on every model shop shelf in the country I'd probably only be temped by it's shiney blueness
Get an FS/FS2 ... i am sure you'll love it