I very much doubt you'll regret that decision. I went with just about every option available when I ordered the MX6000 with cab, things such as the air ride seat, external mirrors, work lights, rear defrost/wiper, top-n-tilt, 3rd function, three rear remotes and so on. I'd rather get it all done right the first time around and I plan on keeping this tractor for many, many years to come.Excellent post. You changed all my plans.
Looks like I'll go MX 5400 with a cab. Now to get to ordering it and wait.
My wife says get everything you want and do it once. Good advice.
Good luck with your order and I hope you get it sooner rather than later.