New Relic for code quality?

I'm looking for alternatives to New Relic that include more/better tools for incident response and logging and will still allow us to monitor performance. We've got a large legacy project full of holes and we go down the rabbit hole with xdebug about twice a week with critical fixes currently. I'd like to get ahead of the curve and start finding issues before they bring down our production server. The client is hesitant to spend a lot of time/money on automated testing and our QA team is pretty taxed with testing current development and deployments. Are there any good out of the box solutions/affordable services (on par with New Relic)?