About those Toyo tires: 195/50 15 or 205/50 15. They're OK for the track or strip, but might look a little funny going down the street on a Spyder. 205 is way too wide in the front.....and the tires are pretty short height-wise.
As to the Vred Sportracs, I'm looking for 185/65 15 and 205/60 15. The 205/65/15 is a little tall for the back of a Spyder. 195/60 or 205/60 are good rear choices.