There's quite a few changes in that version, including HTML email, youtube support, Documents to Go.

Do you have a media card. If so, I would recommend creating your own ringtones and using them.

It's very simple to do. Here is how I do it.

Download a free program called Audacity.
Install it to you PC.
Open any song you want to use as a ringtone in Audacity.
Cut any 30 seconds of a song that you would like as a ringtone and export it as an .mp3.
Move that newly created .mp3 onto your media card.

Once you have completed making the ringtone, then set it as your ringtone.
Profiles > Advanced > Normal (or whichever you're using) > Menu Key > Edit > Phone
Once in there, select Ring Tone and select Browse. Locate the ringtone on your media card and save your changes.

You can create all kinds of ringtones/notifications this way.