I'm fine with dub only, the one in Burst was perfectly solid.
When people talk about the dub lacking quality, do they mean characters like Dr. Sakaki talking like a stilted weirdo? Because that's exactly what he sounds like in Japanese too. The only performance I could really kind of fault was Kanon for not sounding enough like a yandere psycho when you get in her line of fire.
I'm a massive weeb, import stuff all the time, but if you're refusing to buy a game for a feature that's really only background noise in the case you don't understand it (and if you do, you have to deal with speech/text dissonance), you're only really hurting the chance of future localizations. I'd be able to get by, a lot of other people wouldn't. Get over yourselves.