When I first started to train for my first marathon I followed Hal Higdon's Training Program. I still follow his intermediate 2 program.
Check it out.
http://www.halhigdon.com/training/51135/Marathon-Training-Guide
Saucony has some good ones for $70:
http://www.saucony.com/en/omni-lx-tight/12077M.html?dwvar_12077M_color=80919-BKBK#cgid=mens-apparel-bottoms&start=1
I have two of these Brooks tights, the previous version. These will cost $85...
Don't know how comfortable you are with wearing compression tights out in public, but I run in compression tights with running shorts over them, so I can still have pockets for my keys and whatnot. If this isn't a route you want to take, run in sweatpants, or sweatpants over the compression...