Good IWB Holster for the Skinny Guy?

[butterball]

Ok, i'm about 6'0", 155lbs.....what would be a good (and comfortable) IWB holster for me? I haven't decided on a weapon of choice yet but it's going to be either a Glock 23 or a Sig P229. Also, what position would be good to wear the holster?

Thanks,

Butterball