its a tricky one

the focus RS mk2 is still rare enough to seem special, and it will drive better, be more comfortable than the older sierra.

the sierra is a better investment but once you tax insire and run the thing that goes out the way so it doent really matter

personally i would do it, you shouldn't hold on to everything for too long especially once you have tried the new.

i loved RS turbos and owned 3 from 2001-2006, then 2006-8 i had a saff and traded up for a focus RS.

5 years down the line and an RSturbo turned up for sale, it was cheap so i bought it for nostalgia and cos i loved them, after driving the focus for so many years it made the escort seem like a dinosaur, it still looked lovely and was nice to tinker with but if you really want to drive the thing, it needs to be modern. (this is just my opinion)

ive thought about upgarding my FRS to a mk2 but im just a little concerned about the sheer size of the thing as the mk1 is a tight fit in the garage....

and the values are still sky high on them