Just to illustrate the very minor difference:
From PAC-
PC 7424 $149.95
Meg's pad kit $45.95
10% DC discount code
FREE Shipping
Total = $176
Approx. $20 difference. It would be delivered to your door. And you can never tell what freebies/extras will be in an order from PAC. Plus you'd be supporting the site.
Not one to try and push for someone buying from the sponsors (I bought my PC at Lowe's), but for the little you might save driving around town, you might just end up with more getting it from PAC.
Buying online is not always best, nor is buying local. Just seems that if someone wanted a starter kit with all they'd need to begin detailing, it might be a good deal to get it all in one swoop.