Custom HttpHandler and loading page.

[Mutley]

Hi All,
I have a custom HttpHandler that handles requests for pages
with my custom file extension of sfdl.
Within the ProcessRequest method of the custom handler I want then to
getthe page. I currently do this by making a call to the method
GetCompiledPageInstance of the PageParser class.
I have been trying to get information on the advantages\disadvantages
of using GetCompiledPageInstance instead of using Server.transfer,
Response.Redirect or Context.RewritePath

Can anyone supply some advantages\disadvantages of the various methods

Thanks in advance for any help
John