Sounds like a monitor profile issue. LR does not play well with ICC version 4 profiles, so check your Eye-One match calibration software settings and make sure it is set to creater ICC version 2profiles. I suggest also using 6500K color temperature and 2.2 Gama.
Create a new monitor profile with these settings and try an export to JPEG with sRGB profile. Are you comparing the JPEGs as the appear reimported in LR or are you using a separate image viewer for viewing the JPEGs? Knowing that will help.