I went down the rabbit hole last year. While I don't plan on buying more #1s, I couldn't be more pleased with the Lipseys 275Rigby #1A that I did buy. (Thanks Prophet River

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They are a very nice combo of different features that distance them from the std. #1A including a 24" bbl, red pad and express rear sight. There are a couple negatives that should be added to this as well. The comb is too high for using the sights and The 1.5-5x20 (or similar) is about the only scope that will fit over the higher rear sight. These two issues were no issue to me as I don't want to use the iron sights and the 1.5-5 was the scope I planned on using anyways. Perfect scope for a 7x57 in this application.