I just got my 2009 V 5 days ago and am in the same situation as the OP.
To make a long story short , I worked my ass off to get into my car. I just got my 2009 5 days ago after about 2 years of hard work and saving to finally get my dream car.
I LOVE the car as it is and am more than happy with it as it is currently.
I always will have the inner little voice telling me how much more fun the car would be if I were to add some mods , and am constantly looking at videos of other V's that have had some mod work like pulley / tune / intake etc. and would love to do the same. I definitely have the mod itch.
The only thing is that in my personal situation , this car is my daily driver and do not , nor cannot afford to void my warranty or really be able to afford it if I encounter any major problems by modding my car.
It is really hard to judge if modding is worth the risk on an individual to individual basis as what may work perfectly fine on one car could potentially cause issues on another. I am by no means even close to an expert on these cars and how mods could effect them , but I feel simple mods like a CAI ( AIRAID with a dry filter or one that would not require a tune) / exhaust would not cause any warranty issues nor could hurt anything.
The things that scares me is when you get into pulley swaps , tunes , inter- cooler , and beyond. I am sure if you were to add these things correctly AND had a knowledgeable person tuning and making sure things were installed correctly and dialed in , it would not be an issue. However , the small risk that you run by doing this , coupled with the fact that warranty would be tossed out the window , makes this a very hard choice for me to make.
If money wasn't an issue and I could handle the $$$$ it MAY cost me if I were to run into any issues , my car would be in the shop right now getting it all done and not stopping until I was at 600 rwhp
For now , I am sticking to the very basic and "safe" mods , waiting until my warranty runs out and saving money in the meantime. In 2 years or so , then I will be able to go crazy , knowing I have the $ to fix/ tweek things if need be.
I try to reason with myself and resist the mod bug by asking myself
" Self , is the 25 (50/75/100) HP worth the potential risk of breaking down or not running right and voiding my warranty"?
Right now , it is not , in 1 1/2 - two years...... most definately