When I moved back to the USA I had a dress Argyll and three evening doublets: a Sheriffmuir; a Regulation Doublet; and a Prince Charlie coatee. The PC was waaaay to small and was recycled to a good friend; the Sheriffmuir was also a bit snug, and was passed on to a fellow X-Marker (also a good friend). I replaced the Regulation Doublet with another from MacKenzie Frain and will up grade my dress Argyll jacket in the not too distant future.

It has been my experience that Sheriffmuirs are the least practical in terms of both cost and comfort. In my opinion, a Regulation Doublet is the best choice, followed closely by a dress Argyll jacket with grosgrain gauntlet cuffs, grosgrain lapels, and black velvet collar. The RD is more versatile as it can be worn with black or white tie; a dress Argyll -- even if tricked out with silk cuffs and lapels-- is really only suitable for black tie.

Because my jackets are "made to measure" they are comfortable and fit well. In all probability the Argyll is the slightly more practical, and slightly less expensive. If I could only own one evening jacket, it would be an Argyll.

Hope that helps!