So drove a 528xi this morning and it's perfect for ME. I did not see that much difference between the two in terms of ride quality, idle, "4 banger feel", however it is a little faster (535) on the low to mid rpms.
I'm sure there will be mods soon: software, exhaust, intake and I'm sure I'll be around the same power if not more. I rather spend the extra money and replace those hideous wheels and maybe a lip, diffuser, spoiler and room spoiler.
I too had fun driving this car, again im not buying for speed otherwise id buy another E60 M5 so going to call the dealer to ship it. I'm getting an amazing deal and makes no sense for ME to drop this deal and go with a 535 just for a little more power and pay regular price for the 535. Let's hope I don't regret it
Thanks for the help in making my decision!