EWP, SYP, or quarter sawn poplar for window trim?

[forrestM]

I am going to make some window trim and I have some shorter logs of EWP, SYP, and poplar available for the job. What would be best for exterior painted trim? the house will have 5/8" thick horizontal lapped poplar siding. Planning for about 1-1/2" thick window trim, though it may be a little thicker if I am adding a 1/4 inch rain screen gap behind the siding. If I do poplar, I would be quarter sawing it. 
I am open to using all 3 species - just curious how they would rank! 

Does this post belong in woodworking? 

Thanks,
Forrest

[Don P]

Paint grade, poplar, you'll need to do a stain blocker coat on the pines to keep the knots and extractives from bleeding through.

[cabindoc]

Poplar after it has been in kiln and MC down to 10.  That should solve any knots bleeding issue, but primer of some sort agreed.

[GeneWengert-WoodDoc]

SYP will warp too much as the outside humidity cycles.

  EWP and yellow poplar tend to be stable, with EWP being the most stable.  Both paint well.  The biggest problems with window millwork is that the end grain picks up moisture and can decay.  So, treat the end grain with either a decay inhibitor (fungicide by dipping) or seal the ends,  during construction.with paint that provides water protection.