The 2.5's in the older RS's appear to have A TON of head gasket issues once you hit anywhere near 100k. If the head gasket has been replaced and all the maintance is done then you should be okay for 200k.
But when you are talking 10 year old cars it's a rather lage gamble as to how long they will last. I have a 95 escort with 200k miles on it keeps chugging away, but I dont know for how much longer.
To be honest with you it would probaly be more reliable to get either a newer 2.5rs (2002+) or look around at civics, camry, and cars of that sort.