Polish living standard in major metro areas are significantly above Belgian standards. I lived in Poland and Belgium, among a few other places, and I'd choose Poland over Belgium for a number of reasons. Its a great country, good infra, excellent engineers, high education standards, you can talk to anyone in English, the government usually does work, and if you want an appointment with a specialist doctor, it takes a few days tops (on a private insurance, which is cheap by most countries' standards).