Ideally, you want to present your band with the best first impression possible. If you think what venues and promoters should hear is different to what potential fans should hear, maybe you need two different recordings. For original doom stuff, a lot of your gigs will come by talking to other bands, keep that in mind. Find some other bands you like the sound of and talk to them and also whoever recorded them, ask their advice. Personally, I'm of the mind that clean recordings can easily be made heavy and dirty but a dirty recording can only ever be dirty, sometimes at the expense of heaviness.