Hi Max,
Do you have the requirement that you need to concurrently insert a large amount of data into your
database table? If so, using a heap table with only non-clustered index would be helpful for
improving INSERT performance. However if you just have one job insert a large amount of data, I
recommend that you create a clustered index on the table since not only it can bring better
performance on INSERT/UPDATE/DELETE operation but also on SELECT operation. I would like to
recommend the following article for your reference:
Comparing Tables Organized with Clustered Indexes versus Heaps
http://www.microsoft.com/technet/prodtechnol/sql/bestpractice/clusivsh.mspx

Appreciate your understanding that for such performance advisory question, actually there is no
BEST setting. We can just give you some general suggestions and whether or not it is really helpful
for you, it requires your performing more tests to check if you encounter any performance issue.

If you have any other questions or concerns, please feel free to let us know.

Best regards,
Charles Wang
Microsoft Online Community Support
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Just a guess: is it something like a queue? If yes, have you tried any
ready made implementation of a queue?