It sounds like a good range of gears to me. My temptation would be to use a slightly larger big chainring -- maybe a 42 instead of a 38 -- but gearing is personal. Ultimately, what works for someone else won't be ideal for you. That your lowest gears are as low as they are is a good thing in my opinion. I have a similar gear set up myself -- my low and middle range are almost the same as what you are proposing, my high end is somewhat higher -- and it works great for me.