Sounds great Bob! If the AFR is good now, I'd leave it alone, save the $, and get a good WOT Dyno-tune at the 1K mark, as the tech suggested. you should see a noticeable difference ! Let's hear about your seat of the pants Dyno! Enjoy!
Hoist! 
Howie, I'll try to get my scanner working to share the dyno sheet but bottom line is I went from stock with the RH slip-ons and a K&N element reading 87.77 HP (maxed out between 4900 to 5500 RPM) and 109.63 ft lbs of Torque (maxed out at 3500 RPM) to a non performance tuned SERT reading 92.42 HP (maxed out between 4800 adn 5600 RPM) and 112.09 ft lbs of Torque (maxed out at 3500 RPM).
Seat of the pants feel is very very good. The dyno chart doesn't show a significant low end improvement but it sure as hell feels like it jumps off the line now. I couldn't be happier and now can't wait to get to 1Kmiles to have it looked at again.