It does sound like he's showing signs of readiness, but if he's still content, waiting will give him another month of bf or formula...both of which are far more nutritionally complete than any solid food. Plus, you'd be putting off any possible issues that can come with starting solids, like gas and constipation. Just my thoughts, but of course, it's like you said...only you know what's best for your baby, and if you feel it's time, then it is!
It seems to me that Tracy's solids plan is geared toward older babies who are on 4 hr schedules and taking 2 naps. You'd begin with breakfast for a week, then add on another meal. Like you said, you can BF first, then offer solids 1 hr or so later. BFing first helps ensure that he fills up on the good stuff, and waiting an hr or so will help him have a little bit of an appetite for solids.
As for rice vs pears, it really doesn't matter. They're both mild and easily digested. Rice is good because you can mix it with ebm and so the taste is somewhat familiar, pears are good because they tend to not be as constipating as his digestive system adjusts.
Good luck!