You are about 6 months late in getting many of the VOOM channels for cheap. Dish offered 10 VOOM channels for just $5/month up until Feb of this year. Those who sub'ed to it, still get them for that price. But new subs are subject to what BFG said above.
Not exactly sure, but I heard the upgrade to the leased receiver requires the BronzeHD package. If you buy your receiver (you would need either a 211, 411 or 622) you can get around that and the 18 month agreement. You would have to buy the entire HD package at $30 a month. you would need to see 110 with either 61.5 or 129 for it to work.