dude...
I wish I knew you were in the market for a bike, I manage a bike shop in Falls Church and I could have hooked you up.
Trainers and MTB's are a weird mix, go get the thinnest and smoothest tire you can find or you will be hating life.
If you want an indoor trainer, check the ones on my shops website
www.tribonzai.com if you are willing to make the trek out here I will give you anything for cost, if you need or want it shipped I will hook you up with a code for 10% off retail and we do free shipping.
The CycleOps Fluid2 is the hot ticket these days... it lists $329, we do $249 shipped then minus the 10% you are looking at $225 to your door, probably around $200 (whatever our cost is) if you want to head inside the beltway