I also like to shoot macro and landscapes. I have the DA15 if I want to go wide but I have found a really nice combo in a DA40 and a Vivitar PK-A/R-PK which is a "Macro focusing tele adapter".
So if I take that combo on a hike I can get both this with just the 40:
And this when I include the PK-A/R-PK:
With a pretty small package. The disadvantage is having to change lenses in the field but that is just often the case. Especially if you shoot with primes. I've also had good closeup results with this converter behind my A 50mm too.
That TC is no longer made but they show up on ebay fairly regularly. It allows for auto aperture but manual focus only. For macro that's fine.