i run my s1 to work every day, mines worth around 4-5k
keep the car garaged,get a good alarm, get a disc lock, get a second car if u can afford it and keep the rs for summer and drive a snotter during the winter.
your insurance is pretty steep btw another s2 will come along at some point im sure thought about getting your no claims down befor u buy one
dont believe a word the sellers telling u about the car, get someone whos owned one befor or into the rs scene in general. rust is the biggest problem on these cars. get it hpi'ed as well.