If you're not concerned about size and weight, a used professional CRT monitor will wipe the floor with any LCD under $150 in terms of image quality. They're getting a bit thin on the ground now, but you can probably get a good one for $20 or less from an IT clearance company.
Something like a big 21" Ilyima, Mitsubishi or Sony designed for graphics work will last for years and years. About ten years ago, when CRT technology was at its best, they were very expensive...$1000 or so. Absolute bargain IMO, as most people nowadays are concerned with having a slim LCD with shit image quality.
Please don't PM me with technical questions - start a thread!