My next bike will probably be a Safari also. The group set is very good for the price and the bike seems made very well.
There are quite a few folks that have used this bike for all kinds of reasons - mine is I want a do all, rough and tumble kind of bike .... one that is at home on the roads as well as fire trails if need be.
I'm 5'11 and will probably get the 20 Inch model in the next month or so. If, like you, I can't get the bars even with the seat I will use an extension on the stem. This bike is not for speed, I want some degree of comfort.
I will put on a Brooks saddle also as everyone swears by them for commuting and touring.
Good luck with your bike and keep us posted on your adventures.