Just bear in mind that sysindexes is deprecated, will be removed in a future version of SQL server and that the rowmodcol is not longer 'accurate'. It's a calculation based off the hidden column modification counters that are in one of the system tables.
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability