How does the 130 compare to the 4.5 on efficiency? I was looking for a daily rider/trainer and using the SB100 on XC races. I currently ride a 4.5 and use my 100 the week of my endurance races. I have read many comparisons vs. the 5.5 but nothing against the 4.5. Also, what about pedal strikes? Is it worth the extra weight penalty to go Lunch Ride to avoid pedal strikes? To be honest, the bike would be over kill for the trails I ride, so I want it closer to the 100 in feel. I just hate re-thinking my climbing lines because of pedal strikes. Thanks in advance for any input.