From my perspective it depends what you want.
If you don't want it to be SO LOUD, I'd get the attenuator and always carry an extra set of tubes (used or new) on you. You'll get the desired volume no problem. Though I wouldn't worry about killing the tubes. I'd just change them out every year and preamp tubes every other (or even third) year. Consider it upkeep.
If all you're worried about with being too loud is the people in the front row, you could get a baffle, or even Weber Beam Blockers. Either of these will block the "straight on" direction from the speakers to the audience. If your high end is shrill or even ear piercing when you ear is across from the speaker, you might just want to get a baffle or beam blocker.
One thing I would try before you buy (even though it is not luxurious) is to turn your cab around backwards... facing a corner or the wall. It will work the same as a baffle, and you 'might' be able to turn it up louder without it killing you. Joe has done this with some Fender combos during guitar clinics, and my brother has done it before for coffee shop gigs.
- Nic from Detroit...
posting on JB's Forum since 6-2-2006Ask me about my handwound
Great Lakes Guitar Pickups Since 2010, Bonamassa fans have taken advantage of my JB friend discount = my cost + shipping.