TRL modded my DV50s, it made a substantial difference. It's got bottom end that it never had (stock).
Top to bottom the frequency response is way extended. Soundstage is wide now, instead of mono.
The picture is awesome, approaching film. It does take a long time to break-in, I think mine has finally settled down, but even out of the box the change was huge.
I'd highly reccomend that you get yours modded.
BTW, TRL has 3-5 people doing the mods, they pull them off the benches building tube amps. and preamps. to do the mods.
deb