for the last 20 replies above mine... he has a 98 accord, 6th gen?

that would make the 5th gen V6 swap the wrong application.

a 6th gen (in US 98+) V6 has 5 lugs, you would need new wheels if you were to use just those rotors. In the US, 98-99 Acura CL 3.0's had 11" rotors that were 4 lugs that would work on a 98 4 cylinder accord... but you need a bigger caliper w/ it.

the stock accord 10" rotors used a smaller caliper than any 11" rotor equipped one.

stopping is a lot tires, maybe the tires are hindering your stopping? but there really is no point to buy just new tires unless you think they will up the selling price of the car later.

are your current rotors at the service limit (think 21mm)? if not you can probably stick w/ them and have new pads + fluid put on.