Stainless or black is a matter of choice. You need to specify either 6.5 in black wires or 7 in stainless wires with 205/65 R15 tyres. Best to specify specifically the tyres you want so as to be sure of getting what you want.
Have a look at Jochen's new Roadster which is fitted with 205/65 R15 tyres and a 165/80-15 spare
http://www.talkmorgan.com/ubbthreads.php/galleries/95840/3 It really looks good.