Updated Findings for .141
So I posted my initial finding .141 late last night. After running it now for 14 hours the two issues that I had, mainly battery life and memory leak have stabilized.
My memory which was down to about 35mb last night has settled in at 42.5mb. Not quite as good as v4 but a very good number nonetheless.
Battery life: After a full charge and using the phone quite heavily today (90 minutes of call), 40 emails, web browsing, Pandora, etc. my batter has only dropped to 83%.
So in my opinion this the best OS have used to date. Browser speed for example has been averaging 960kb which is crazy fast compared to v4 where I was getting around 500kb. There is no doubt the .141 SFI file is the best I've used.
Hope my findings help some of you out.