iOS 5 Beta 1 or 2? (For development)

I'm an aspiring, albeit poor, iOS developer, who just got approved into the iOS dev program.

I've only got 1 iPhone (an iPhone 4) to test my apps and such with, so I'm being very cautious about actually installing iOS 5 betas... as this is also my day-to-day use phone.

From what I've been reading on this forum about Beta 2, it sounds almost like staying with Beta 1 is better? I use facetime on a regular basis with my girlfriend, so it is important to me, but I guess if I had to go with Beta 2 I could just use my Macbook Air to facetime.

I know that with betas not being meant for use on production machines, my best bet would be to stick with iOS 4 for a while, but as I understand, iOS 5 has garbage collection? If so, I'd much rather save myself the headache during development and code on a platform that does garbage collection for me. (Any experienced devs willing to provide their opinion on that would be greatly appreciated)

So, just a general, constructive opinion would be greatly appreciated.
Stick with iOS 4 for testing? or iOS 5 ? Beta 1? Beta 2?


Thanks!

 

It's not so much that I'll be writing an app to sell within the next few months, I mostly plan/want to develop and test apps on a real iPhone. With the simulator, you can't test things like having a button make a phone call, etc, so yea, testing it on the real deal.

The biggest reason I'd think about testing my code on iOS 5 is that garbage collection issue. After reading a huge section on memory management in Obj-C, my head is about to explode, so I'd like to get an expert's view on whether or not having to manually releasing every bit of memory I use is going to be necessary on iOS starting 5. (I've done some java in the past, so if the garbage collection is similar to Java, then I guess I don't have to worry so much.)


I'd love to hear everyone's opinions about any of those subjects, and thank you again in advance.