There's something about the websites I visit and another apps I use that seems to cause low memory crashes all the time. Had it with my first iPad 2 so I upgraded to a 3. Had it with my 3. I'm now using the old 2 since I gave my husband my 3 (he needed the extra storage for movies and podcasts, he's overseas and has really,really bad wifi). Same low memory crashes.
I'm not sure if I want to pay that much on the off chance that the iPad Air will be better (I was planning on the 128 gb LTE version). I probably will get one and try it out. Hopefully if it can't handle it it will crash within my return period. If so, I'll get a Surface. I have a lot of $$ invested in the Apple ecosystem and have gifted all my old iPads to my grandkids so they FaceTime all the time. Guess they can use Skype if I get a Surface. Sure won't like not having access to my purchased TV series. D@mn!!!