should i upgrade?

I've been running my system(see sig) since december last year. I haven't touched it since then, well 'cept for when im adding water to my res. Now, im thinking of upgrading my cpu waterblock and pump. im thinking of getting the Swiftech MCW6002-P and D-teks AquaXtreme 50Z-DC12 Mag Drive Inline 12V Pump. is it worth to upgrade? im getting decent temps with my a/c running most of the time in my room.

heres what my system looks like...

what is your current pump? 28 is a good temp. A new block might shave a degree off if your lucky.

i guess im just bored with it. i wanna try and redo the setup, maybe shorten the tubes a bit or something.

If you pull off that side panel and give us a good shot of the internals maybe we can help you with some suggestions?