Comment by Pamz on Fatherjack's answer

Thanks for the reply. My version is sql 2008. But let me explain it a bit further; I want to delete first top 5 million in order of insertion. I already had it covered for a clustered indexed table and for an archival based upon a date column. Not sure if this FIFO kind of work is possible in heap especially when SQL server can delete the data in an order which only SQL server knows (IMHO). With these details, can I take your reply as a solution?