17/43 or 17/44 sprocket combos...

Hi all!!!
I'm using my girl more and more for slab commuting, and less for chasing canyons these days. I was thinking of going +1 up front to a 17t. Can those who have used or currently use a 17t front sprocket chime in on your experiences and opinions? I would like to keep some zip, but I'd love to stretch the tank (better gas mileage for my commuting...I'm a Clydesdale and routinely get between 36-42mpg, depending on load and hwy versus city). I don't want a total slouch, so that why I was thinking 17t vs the 18t. Also, what are your opinions on going 17/43 vs maybe 17/44? Has anyone ever done a 17/44 or even a 17/45? I'd be really curious as to how that would change the characteristics of the power delivery (ie, would it give back some of the zip lost in staying with the stock 43 rear)?
As always, your comments are much appreciated.
Much luv...Juce:smile: