So much to do!

Good morning ladies! I am in total momma mode this morning and finishing up some shopping off my Target registry, so before I used the coupon I have a few questions. Would you all buy a pack of bottles and leave them unopened to return if they don't work? I have one of a few different brands to try, but as long as all goes well, we want to use Tommee Tippee. Should I take advantage of the coupon or not worry about it until later? Also, I only have two packs of Pampers sensitive wipes. Would you purchase a pack of another brand incase he can't use Pampers? I just want to make sure we don't get home and have no wipes because Pampers break him out. If so which brand do you recommend? Thanks in advance!