Thanks for taking Aurora off your list - ha, ha! Every chicken that gets confiscated in Aurora ends up at my house and I'm full. I know you want to be close to DTC, but with E470 you can sneak around from a lot of places out east and just come north up I-25 from the tollroad (speaking from experience, my husband used to work in the DTC). The closer you get to I-70 on E470, the cheaper the housing gets and the closer the line gets for unincorporated Arapahoe County. I think some of those places are actually listed as Watkins (which is technically where I live). It might be worth checking that out.
Not looking forward to those tolls and I have been looking at schools out that way and they don't get the best ratings. I am a bit of a stickler for education, I have been to low rated schools and high rated schools. I actually am still considering a really good deal in Monument for that very reason, they have the best school district in Colorado.