[spooky]

The speeds that you use shouldnt cause any problems, its all down to the reliability of the burner, system and media that you are using although some people may argue this point.

As far as best performance is concerned between the x-change cd and a game enhancer then i would sugest the x-change cd, but this is only my opinion based on what i have read.

The enhancer seems to give more trouble with third party devices such as memory cards and controlers, and can also cause the extra discs from multiple disc games not to boot

The x-change cd i believe would give far better results and this would be the one i would go for if i were not happy about an internal mod chip being fitted.