Asking other people for saddle advice is like asking other people about advice for shoe fit - it's very individual, and don't transfer particularly well.
I've never had any luck with gel saddles. Sure, they're easier on the sit bones, but as the sit bones sink in, that just ups the pressure on tha area inbetween.
And as for five miles as in long distance, that takes you what - 20-30 minutes?
If you're troubled by that, odds are that the fix for your issue (assuming your current saddle isn't entirely wrong) is simply go get more practice.
I'm not saying you need to develop callouses, but there's a definite element of adapting to the load here.