Don,
Didn't mean to offend you. My reference to the Mitutoyo was just as I wrote: that it is "relatively inexpensive." Relative to the Sunnen and higher end dial bore gauges. The Mitutoyo that I have cost about $400, (less than half of my Sunnen gauge.) I call that "relatively inexpensive." I think the Fowler was about $100 or so when I bought it -- if you want 'really inexpensive", that would be the better choice I suppose.
I think it does a real good job for the price and would be adequate for the DIYer.