Official upgrades for T Mobile Compact 3

[Roman5]

I've downloaded 2 official updates from t-mobile.co.uk site for my Compact 3, the latest WM5 ROM and radio fix. Can you tell me if it's worth going ahead and installing them to the phone and doing the upgrades? My phone is working fine, although the battery drains very fast (may not be the rom) and gps fix is always about 2 minutes, sometimes longer.
The T-Mobile WM6 upgrade has expired on their site, so that's a no go anyway.

Obviously I don't want to upgrade unless it's absolutely necessary or unless I'll greatly benefit from it. Since this is just an upgrade rom to the existing WM5 O/S and not WM6, does this mean it will still hard reset the device and erase all data? I'd obviously back everything up first just in case.

Here's the link I downloaded from:
http://www.tm-phonedownloads.com/sd_compact3.html

The ROM update file is called: ART_TMOUK_11311001_024990_WWE_Ship_R3.exe

The Radio fix file is called: ARTEIMG_TMO_UK_4.1.13.251_02.92.90_RadioOnly.exe

I presume I don't need to do a Cid unlock as there's nothing on t-mobiles pdf instructions about that. http://www.tm-phonedownloads.com/files/install.pdf

My ROM version is 1.13.110.1 WWE
ROM date 22/9/06
Radio version 02.49.90
ExtROM version 1.13.110.101