Protune will always be your best spent money if you have the right person tune it. With adding more and bolt ons i think a protune is much more beneficial. You will be fine with ots tunes or e tunes with basic bolt ons. But even at that the before and after of just stage2 from ots to protune was a nice upgrade and knowing thats its tuned exactly for your car is well worth the money. Cuz it could end up costing you much more down the road. Just my thoughts, alot of people are perfectly fine with skiping out on a dyno tune tho. Just seems like its a must have if you care about your car runing the best it possibly can. Wheels and such are also nice to but all that stuff is worthless if your car is not running properly and is always having problems.