Unless it's broken, or severely hindering performance, I'm behind the :arrr: 100%. If you have al oose front end, by all means get it upgraded, but if it's just for the sake of upgrading you might want to wait. Enough patience, and it will break lol. You'll get to upgrade it sooner or later.
Too Many times I have upgraded parts at the begining of the month only to break what's next down the line. The problem is it's usualy after I spent the majority of my R/C budget on upgrades.