What size iPhone 5s is suitable for me-music lover?

I currently have 2385 songs on my 16gb iPod nano--I sometimes have to delete about 3 or 4 songs in order to add 1 or 2. I have an Android phone with no music on there. So I'm considering getting the iPhone so I don't have to keep track of 2 of the most important devices to me.

I take some pictures, not a lot. I usually just download a lot of them from online like Facebook and Pinterest. I also don't have too many apps; I just counted and I have downloaded 39 apps and none of those consist of games or the apps that came with the phone.

So what size iPhone would be best for me? The 32 or 64GB?

I can't sync my iPhone to iTunes properly?

What i mean is sometimes when i connect the cable it syncs but sometimes no.
this has been happening since I've downloaded maverick and brand new iPhoto to my mac
I'm talking about photos sometimes they're synced sometimes not.

Where to put iPhone when Weight Training?

I never really did weight training at my gym, mainly at home. However, I like the barbells at the gym better now (I have dumbbells at home). My weight training has a routine with certain moves to beats in these remix tracks, which I listen to for cues.

My question is. Where do you put your iPhone when weight training? I have no pockets in my pants/shorts, and don't really want to stuff it up my bra. Is it considered weight to place it between the pants and the hips, i.e. Touching the flesh part of the skin, or is it a little gross?
Do people put it on the floor or on the bench if the the wire is long enough? I'm only doing weight training, e.g. Squats, lunges, presses, etc.

Why does my iphone 4s keep switching on and off?

So i dropped my phone, like anyone does, and I was listening to music, and the screen and everything worked fine, everything is fine, no cracks, no nothing. Then I tried to lock the screen like everyone does to save battery, but it lagged when I used the button, and me being impatient used assistive touch as well, i guess the speed of locking the screen merged and the whole screen just had black lined stripes, like those of a old television set with white static. Now, it does the whole shutdown sequence and start up sequence over and over, and I can't hold the button down to stop it, or turn it on. Eventually I left the thing to keep shutting itself on and off. And it ended up working but when I used the button it does it all over. What do i do?

Where can I buy a hard-cover or silicon case for a 7inch tablet?

I have and Mach speed trio G2 tablet and I'm looking for a case for it. I've looked everywhere including skinit and case mate. None of those stores support this model. I also tried looking up universal fitting but all that came up were portfolio cases. It would help a lot if anybody knew any stores where I could buy a case like the one you usually see on smartphones ex. IPhone and Samsung cases. ( I've already tried Target, Walmart, and any other store like this) Please list websites or stores where you've bought a similar item.
Thanks!

Added (1). I already tried Amazon as well

I don't mean to sound spoiled?

I don't mean to sound spoiled because with my mother I'm not but I worked hard to get my grades up so I could get a phone. I was so happy that she finally agreed to me getting a phone I told her I wanted an iPhone4s I've always wanted an iPhone and I was inlove with that design and that phone was free she asked me everyday what I wanted I said 4s all the time she finally came home today and told me she ordered my phone I was so happy then she said she got the 5c and I wanted to smack her because I talked to her about how ugly the 5s and 5c were so what ran through her mind I don't know and she sat there and got mad at me for not being exited anymore I worked hard around the house with my attitude and my grades and I don't even get what makes me happy. She always screws up. It's not fair she never treats me good and we always used to fight and had the worst relationship and I don't know. Just had to rant about how selfish she is because she only thinks about herself always