both of these questions would be better asked in another area for more exposure.

1) steering wheel controls: probably going to have to replace the entire steering wheel if not more.

2) wheel size is a matter of opinion. 90% of the people on here are going to say 17s/18s while others who dont think speed is the #1 priority will say 19s/20s. that and the wheel style will vary a lot among different members.