those revs sound about right, check on the underside of ur bonnet, mine has a sticker with factory recommendations, and 650-700 is the warm idle, with around 1000 - 1100 for cold start i believe.
the stupid screw you use to adjust the idle is fkd in mine, i need to get it replaced with a new screw cos i cant adjust the idle, so im on about 1250ish for a cold start and around 900 at warm idle