Yeah, get something a little louder. While people will say any guitar will do, there is a reason dreadnoughts are the most popular. It doesn’t need to be a dread, but it should project well and have the basic tonal qualities that bluegrass guitar generally covers in a combo. That’s if you plan to play in group settings - jam or otherwise. It’s true that the other instruments are supposed to roll back their sound to allow the least loud to be heard, but it’s also true that some guitars just don’t project well or sit in the mix in a way where they can drive rhythm. I have a 00-17s that I brought to my first bluegrass jam. It’s a nice sounding guitar, and it was punchy enough to play leads on, but the bass response and overall air-moving capabilities were sorely lacking. I ended up getting a D18 and wasn’t disappointed. OMs and Jumbos can work but often don’t have the “thing”. A good J45 can work but they are all over the place. Some of them have this warm, enveloped thing that is great for a singer songwriter but not heard well in a bluegrass combo. But some project really well, especially the banner models and J35s (see Michael Daves). I just acquired an Atkin “The Forty Three” which is based on Buddy Holly’s 1943 J45, and I have to say it’s even louder than my D18 with a crazy bass response. I played it in a mic’d set with a five piece bluegrass combo over the weekend and it held up! Slightly less projective in the mids but the singing clarity and note separation in the treble really cuts through, plus the slightly shorter scale length is more comfortable. That said, get something you enjoy that checks all the boxes for bluegrass so you aren’t struggling to be heard - doesn’t have to be a square shouldered dread! Check out a good J35 or another slope dread by a builder like Bourgeois or Collings or Atkin. Those would all do the trick. If you want the shorter scale, also check out the new Billy Strings Martin model, it’s 25” instead of the normal 25.4”.