Storing big chunks of text, variable length

Hi,

What would be the most efficient way, performance wise, of storing alot of 
rather big chunks of text in seperate records in PostgreSQL. I'm dividing 
huge XML-documents into smaller bits and placing the bits into seperate 
records. Requests want all or just some of the records, and the document is 
re-built based on the request. So everything is heavy IO-based.

What would be the best way to do this? LargeObject, the binary blob feature 
of PostgreSQL or .... ????

The chunks can be everything from a few lines to entire documents of 
several megabytes ( ok, that's the extreme example, but still .... )

Best regards,
Thomas