I'm looking to get the Series 3 and hook up a High-Def Antenna and have a few questions. Will this allow me to record two shows at once? Is the reception for these Antennas good or is it like rabbit ears? I'm in a house and will have an indoor antenna - probably the $29.99 model on Tivo's website. I do not plan on having any other input - just regular free over the air goodness.