+1 excellent advise regarding keeping the OEM wheels, it will cost a hell of a lot more than $1800-$2000 to find a set of 02+ wheels in the future when the car needs to go back to stock for one reason or another.
The Advan RS are cast wheels but relatively light IIRC (have as set for my P-car). Plenty of caliper clearance for a BBK, one thing to remember is that for any track work a 235 front tire will work best so need to keep that in mind when choosing offsets for the front wheel.
Problem is that to clear stoptechs you need an offset of +37. But to clear a 235 front tire, you need closer to +45. But then you may not clear the caliper. At least this is what the SOS site implies. Unless someone knows different, this is certainly a quandary.