I love this thing:
http://kippenjungle.nl/kruising.html
But it only explains colours, not crests or eggs. I actually want to do a similar thing to you, except without the crests. I want great big fat Brahmas with more conservative leg feathering (OMG they get filthy) who are wheaten in colour and lay Easter eggs.
Crests are incompletely dominant. Your assorted Polish should all have big crests. Their offspring will still have little crests. Yay!
Blue eggs are dominant, though the blue interacts with brown to form green shades. All your Easter Eggers' babies should lay easter eggs too. Yay!
So here's what I'd do:
P (parent) step 1. Easter Egger x Brahma = F1 EE-Brahmas
P (parent) step 2. Polish x Brahma = F1 Polish-Brahmas
Cross the different sets of F1s - This gives you a huge cluster of F2 phenotypes, but you'll be able to see which of these have small crests, and which (at least with the girls) have inherited the coloured egg gene. Cull those without any crests. Incubate easter-coloured eggs only. I warn you that even after incubating your F2 easter-coloured eggs, half of the F3 chicks that come out of them will not have inherited the blue egg gene. However, this is the time when you will start to see big crests again: When your F2 eggs produce F3 chickens. 1/4 of them should have no crests, 2/4 of them should have little crests, and 1/4 of them will return to the big-crested Polish crest.
So why would I do it this way instead of making Polish-EEs for P step 2 and giving myself a better chance to get less culls with no blue eggs in F3? I think the Brahma provides the superior body type. You may be better off making Polish-EEs. They'll be skinny though.
I'm not 100% on the feathered legs though.