Have finally narrowed down the compresser choice between 2.5 ton Trane XR15 and XL15i. Would like to go with the XR15, but concerned about the noise level. Looking for advice to see if it's worth the extra cost for the (quieter?) XL15i model. The unit will be near a bedroom window, and near a deck. Is the XR15 that much noisier? is there a noticeable difference between the decibel levels? Thanks.