I have the opportunity to purchase either of the following for under $3500: --New Hawken HE1100 (4000sqft) full warranty (no pump or accessories) $3500 --Used Johnson Big John, 6yrs old (10,000sqft) NO warranty (includes pump) $3000 Which should I buy? I have an old 2 story farmhouse with newly poured basement built in 1900. Each floor is about 800sqft --New windows, original insulation, 3 layers of siding --New gas high efficiency forced air furnace w/3 ton AC --New gas high efficiency hot water heater --The home is surrounded by flat farm fields 1. Is there such a thing as "buying too big"? 2. Which brand has a better reputation? 3. Will the Hawken be enough for the house and maybe hot water heater? Installation: 1. How tight can you bend pex-al-pex in the insulated tile enclosure? 2. What is the best place to get quality insulated pex-al-pex? Sorry for all the questions.. but thanks in advance!