Few question 1) Do you want all in "Capital" letters ? right now #17 has X and B capital and rest small... 2) Do you want XBA ? with X bigger as shown in #41
thank you. 1) I like combination of capital and lower case like #17. Try the different fonts for #17 (lower case) I think #17 lower case is what brings elegance. 2) #41 may work with lighter gray background (think apple, inc. silverish gray); and either with extension line below the BA and NO line above or no lines above or below the BA. And try it lower case.
You are right on #17 .......... Personally when i choose that font for entry #17 ..... i like it too much Its clean, clutter free, has a message of Architecture ..... thin still solid .... confident :)