I've done it both ways, and found it fairly easy to adjust. I also briefly played two 26" bass drums, and it was easier to position the hihat on the inside of the left bass pedal, since the drums' diameter forced the pedals to be so far apart.

I'd use overall comfort as your decision-maker, making sure that whatever pedal your left foot uses the most (whether it's the hihat or bass pedal) is in a totally comfortable position.

I played the hihat on the inside for a good while a couple of years back, and I found it very comfortable. It has since moved back to the outside, but the reasons for this had nothing to do with the pedal arrangement not working for me.

Here are a couple of shots from that time, first of the pedals and then the upper part of the kit. Notice how close to the snare the hihat could be positioned, it was a really comfy way to play.

Mr. Acrolite nailed it, really, it was all about having the most-used pedal in the most comfortable position (and this in turn also brought the most used cymbals into a more comfortable playing position).

I can,t get my current set up configured like that. I was thinking of getting the gilbralter legless HH so I could do what you guys have done. Maybe I'll go screw with my kit again to see if I can do what you guys have done.