I like [name_m]Simeon[/name_m] better. It has more quirk. 
I feel like it has all the interesting parts of [name_m]Gideon[/name_m], but all the charm of [name_m]Simon[/name_m]. It feels equally Hebrew AND Biblical to me; I just love it. [name_m]Simon[/name_m]'s much more mainstream, but I find [name_m]Simeon[/name_m] to be so much cooler. [name_m]Simon[/name_m] has better associations ([name_m]Simon[/name_m] [name_m]Peter[/name_m]), but [name_m]Simon[/name_m] and [name_m]Simeon[/name_m] are related, so I am not too fussed on that angle. I do like [name_m]Simon[/name_m], but not nearly so much as [name_m]Simeon[/name_m]!