Road/Off Road shoes

I'm in the market for a new set of shoes.  They will be used for a lot of road rides,  but gravel and probably some mountain biking too.  Lots of MTB shoes have soles that are pretty soft and get worn down easily by lots of foot down on pavement.  Anyone have a suggestion for a 2 bolt shoe that has a harder sole that won't wear down?  I have a pair of Specialized MTB shoes from 2006 that fit the bill, but they're getting worn out.  I don't want a full on road shoe as I like to be able to walk around.  Any thoughts are appreciated

Shoes are very personal. But I've found that the Shimano XC Racing models like this: https://smile.amazon.com/Shimano-Racing-Performance-Mountain-Shoes/dp/B00DWRI0KA/ref=sr_1_3?s=apparel&ie=UTF8&qid=1527382876&sr=1-3&nodeID=7141123011&psd=1&keywords=shimano+xc+racing+shoes&refinements=p_89%3AShimano
Offer a good balance of features for both paved and unpaved roads:
- Very stiff sole.
- Reasonably light weight
- Good price.
- Wide range of sizes and half sizes.
While these shoes are designed for XC Mountain Bike racing; they are a good choice for both pavement and gravel. 

Can't comment on the 'not wearing down' thing, as I'd think they're all going to at some stage. 

Pearl Izumi X-Project (Pro?) could be worth a look. Full-length carbon plate. You might be able to find an old model stocked, for a cheaper price. 

Stiffer than the X-Alp Enduro (which is very good for walking around), with a slightly narrower toe box.