XML over Relational Data Storage

I am in process of designing a database to hold archival data. The data is read only. No updates need to be made at any time.
Entire details about a particular records spans across 10 to 12 rows in the database, if i go for relational approach.
I need to display data for that entire record as part of display mechanism.
The frequency of data to be retrieved is very less. maybe once in 4 months or so.

First Approach:
Since the data is read only I figured that the entire data for a record can also be placed in a big table. Ideally that is something we always avoid, but since it is just read and display, if indexing is done properly, it should be ok right?

Second approach:
put the entire record data in a xml file and save in the database as a blob.
Use tools such as Db2 XML Extender for retreiving the data.

which of the two approaches should i go for. Are there any disadvantages in using second approach in terms of performances?
Are there any advantages of second approach in terms of Database space(blob is compressed right?)
I am quite new at this and will appreciate help.
Thanks,
Chetak