[nosmohtac]

I had no problems with WM5. I can do without the HTML email, since I wanted push and don't have an exchange server I'd have to rely on a 3rd party app anyway, like flexmail or profimail. I know that windows live hotmail pushes email to you, but I use gmail and don't feel like having everyone switch email addresses again. I know I could forward my gmail to hotmail, but don't want to double up all of my email and have to delete from multiple accounts.

The biggest reason I don't use it is because WM5 doesn't support SDHC.
I tried a couple of the WM5 roms and the SDHC drivers and couldn't get it to recognize my 6GB or 8GB cards. I would rather have the storage capacity than the small speed improvement.

As far as RAM goes, DCD's 1.7 clean ROM boots with almost 26MB of Free RAM and is very stable.