There's nothing sinful about going to a different LBS to try out bikes!
Walk in, say "I'm not buying a bike today, but I'd like to test ride some Jamis and Kona bikes. Do you have time to help me?"
Then they know right off the bat that you are not an instant sell, and their feelings won't be hurt if you walk out the door without buying anything.
You might like going to a second LBS, sharing the love is ok! I have a couple favorite LBS's, it's all good. If your favorite LBS is under obligation to Specialized or Trek, they might not be able to get you the bikes an independent shop would have, but you could always ask them to try.
"If Americans want to live the American Dream, they should go to Denmark." - Richard Wilkinson