Bob at www.fixmyangel.com
is still doing the MT mod on a case-by-case basis if you want to look into that as well. It looks a little cleaner than the TAG/DM eye mod, IMO. Bear in mind you're also going to have to figure out which board you want to use, which may play a role in your decision making as well.
To be honest, with ROF caps being as low as they are these days, capping your MROF and running a fast hopper is usually good enough to keep you from chopping, and a lot of purists prefer to see the old-school guns unmolested. Especially if it's a rare body.