kumho ku25's arent too bad imo if you are on a budget and arent driving around like you have a racecar
these are pretty cheap - $57 each (assuming your 15s are 195/50's), and thats US price so a little cheaper again
http://www.tirerack.com/tires/tires....omCompare1=yes
$228 a set + post, could get a set of 4 at your door for under $300