I think the 121's have a unique 'style' in addition to being the first of the GM family in Ireland. From the stunning silver liveries right up to IE, they span the gamut, and are a perfect match for the mk3 push-pulls etc. The thought of a pair double heading a cement, or with a 141 on beet, just lights a fire I'm afraid
As much as I love the 201's, they are soulless by comparison.