Been busy so I haven't stopped by here for a while. I am in the process of building a DMR/SPR/RECCE/ Whateveritisthisweek rifle currently. I have not got them yet, but I have ordered a set of offset irons and an offset mount for a T1 because I didn't know the answer to the above question. I plan on installing both and shooting with both. I'm interested to hear what others have to say.
Was thinking the same thing as TerminalEffect. Also, outside the DR I think the irons will weigh less, cost less, and (if folding are used) be lower-profile.