Hi, I used to have the JBL305's even without the subwoofer (not needed) they sounded Great . I Compared them with Adams and other more expensive ones in the store- went with the JBL's because the difference in sound didn't justify the price difference. I tried the Headrush and the Laney IRT-x (which I have owned also) They were ok. The biggest difference soundwise was when I got the Kemper cab Wow! I got rid of everything else - real amp in the room sound different cabs to choose from. I almost sold my Kemper since I am a tube guy but now that I have the Kemper Cab I am keeping it. ( The styles I play are mostly classic rock and low/medium gain)
Hope this helps, cheers!