The diameter of 305/30 is smaller than the stock 275/35.
The sidewall will look thinner and you will have more wheel gap.
If you stay stock tire diameter or go larger diameter tire up front, you will pitch up.
I’ve seen the Mikan Blast IRL, not a fan so it wouldn’t be worth it to me. But if you had a Nitro before and you like the brighter colors it may be worth it to you, especially if you want a rarer color to stand out.
Are you pulling straight back into 2nd? You might be getting 2nd gear lock out, which I used to get. This is my 1st BMW manual, and it is a little finicky compared to previous manuals I’ve owned. Once I got used to it, it did improve. What significantly helped was the Auto Solutions shift kit...
I installed MAD intake (MST rep), after I already had an exhaust and catted dp. It is definitely louder than stock, with a lot of turbo noises and BOV sounds at full throttle.
Not sure how it would sound with stock dp and exhaust, but I assume a little quieter. Are you stock dp and exhaust?