.....So the question is, do I stick with the 16” bass drum, because if not loud enough, the 18” might not be enough either??? Miked up, they’d probably both sound the same. So maybe just keep the status quo for now and save up eventually for a maple kit with 20” inch bass drum in the future?
For just a few bucks more than the 18, you could get the 5 piece SC that comes with a 20" bass drum.
Even if you only play a 4 piece, the 20" is a much better all arounder than an 18.
If you want maple though, that's going to up the cost more.
At least you've got a set you can use now while you're deciding.