Welcome!
You're in the right place.
Don't feel embarassed about stopping by your LBS. They are supposed to be there to help you. If not, just move along to the next shop. Basically everyone modifies their bike somewhat so that it works best for them. It is OK to ask about this. The main problem with heavier riders is the strength/durability of the wheels. On mtbikes and hybrids, another worry is that heavier riders tend to overload the front suspension. Many have opted to go back to rigid forks instead.
Hardrocks have a great following on the clydes' forum and would be a good choice I think. Budget for the aforementioned modifications in case you need them and you should be fine.
Be sure that the bike will fit you before you bid!!!