I've had a few sets of Rotas, used 15x7 Slipstreams on my race car for a few seasons, great rim for the price.
I have owned Volks (CE28n), SSR (Schumacher), Rota (Slipstream, Circuit 8), and even Fittipaldi (500) back in the day, Rotas are great for the price. Would much rather have those then some of the other "cheap" rims.