Ok, so I brought my SP3 into the miami MS store today, showed my battery was at 40% max capacity at full charge (23K Mw) He looked at it for about 3 seconds and was like, "Ok, well give you a new one." Definitely cool of MS, for sure. Wasn't expecting that. So, my question is, should I keep this new SP3 unopened, and sell it on CL or Amazon, and put the $ toward a new SP4 or SB, or just stay satisfied with the good ol' workhorse Sp3? #firstworldproblems!! As a side note, I did have a chance to check out the SB and SP4... Sp4 is nearly identical with regards to look and feel of the SP3, difference is SP4 is a bit thinner. SB, though, is incredible.. It's amazingly light, display is crisp and trackpad feels great!!! I loved it!!