if you're "applying early", is it safe to assume you mean within the next month or so? i put mine in on august first of last year and it took, if i recall correctly, over a month to finally be fully verified. of course, do not sacrifice quality to get it in earlier.
a suggestion for the immediate future (ie. amcas) would be to really broaden the list of schools to which you plan on applying, though, i'm sure you've already figured that out on your own. your GPA is great, and im guessing that you took the pre-med requirements and did well... so, while i understand why someone may say your GPA is high because of your major, it still means something that you did well in the basics, and in all of your classes in general - though i do see your point about an SMP being one way to validate that you can actually handle the "hard stuff".
as for this year, if you feel like you're a bit weak on either research experience and/or clinical exposure, you might want to try finding time for one/both.. both may very well come up in your interviews (definately did in mine). if you can square something away to put on your amcas before finalizing it, good... if not, i think you can probably update it, or send the schools to which you've applied an update letter.. can anyone expalin the update stuff?
if you're fine with both of these, maybe still try to find some type of service project to get invloved with (eg. volunteer at a free clinic). it will be fun rewarding, provide clinical exposure, and may be something to talk about in an interview.