I agree with Louie to a point. I'm not willing to spin the stock rotating assy over 5,500 rpm. That's why I'm going with a 206-206 flat tappet cam, nice ported stock heads, and a huge turbo, intercooler, and downpipe. I revved the motor to 6,000rpm one time against the Viper and it pulled hard the whole way to redline with the 206. My goal is a 10s capable car and I don't think it will be considered a race motor by any means.
I agree a roller cam would be great. There's really no compromise with a roller. Great bottom, midrange, and top end. I would have one if I could afford it. Just because it's a roller cam doesn't automatically mean you lose bottom end. There are different sizes of roller cams.