Do try calibrating as others have suggested.
The UltraSharp U2410 is an excellent monitor. It or the 2408 should work satisfactorily with your 2001FP in landscape+landscape mode (3520x1200 desktop).
My 2001FP is in portrait mode beside an UltraSharp 3007WFP (3760x1600 desktop).
i7-6700K, NT06-Pro, GA-Z170N-Gaming5, 32 GiB, 980Ti, SM951, 5TB HDD, Blu-ray, FTZ01, SX600-G, 3007WFP+2001FP, RK-9000BR, MX518