The next obvious step from a value point of view is the Endura priced similar to the Delica. I have two Enduras, but have chosen not to carry them because of the blade length, my perception of people's reaction to blade length, and convenience of carry. Personally I have found the Delica to be just right for regular carry and I tend to look at knives that are approximately sized like the Delica. I very much like the Native 5. The Manix is a bit bigger.
You can go smaller with the Dragonfly as an example. It is a pretty handy blade. I personally don't own one. I got a Kiwi 4 about a year ago and really like it for regular carry when I want something light, but I feel it might be a tad over priced relative to the steel used. But still really like it.
Many of the popular Spydies are much more expensive than the Delica. That is a decision on value you just have to come to grips with.