First Time Ordering New Rig - Advice?

Hey guys, so I'm about 1.75 years in, father is O/O, I rode with him then went local. About to order myself a rig, specifically a W9L. In terms of specs I am talking to a local KW rep who is helping me out with the process, but I want to get some input from you guys who have ordered a rig. In terms of base operation facts I will be running reefer from PNW down to TX and surrounding states. I'm planning on running 3.36 with 22.5 LP, 18 speed (for resale, from what I was told weight savings aren't much between 13 & 18), 565 cummins, 280 WB, debating on 72in vs 86in sleeper in terms of cost, resale, and weight savings. Still debating on suspension. 2 piece flat glass, 2 piece curved, or single curved piece for windshield? Any costs and availability I should account for when it comes to the windshield? KW rep says that gearing and tire profile would put me at my desired speed of 67ish mph and keep me at the sweet spot of these new cummins motors. Should I spec for higher speeds? Is 67 too slow? Can 3.36 get me climbing hills without TOO many down shifts? Should I spec a different gear ratio that will get me running a high speed since I am running an 18 and have gears to play with going uphill? What would you guys spec with this platform, running this route, at 80k gross?

Now obviously this isn't the most conventional and convenient rig, I know. I am taking the hit in terms a fuel economy, overhead, etc. After having driven a Cascadia and a 280 WB W9B day cab, I was sold on comfort. I must also say I am hard headed on running a long hood, more so because of desire than making the most profit possible. I will slowly be customizing the rig as time goes, nothing show worthy I don't think, but a head turner for myself and some. Please feel free to educate me! My father has only owned used and just focuses on running hard with whatever spec he can get his hands on. I am kind of on my own in this process in terms of spec. Don't worry about accounting for expenses, I know, and am still calculating as numbers come by.

Thank you!

 

If I remember correctly, the sales guy said there is no additional or decrease in cost with the 3 windshields, not sure if he mean't on the initial order or in general.

Good to know though, thank you. Availability is also something I need to account for.

 

Ooo, okay, good to know. I only spoke with the rep through the phone so he could give me a ton of specs and price, will go through fine details with him once we meet.