I thoroughly adore my RM'd Lotus Elise 111R (134,000 cr. for the modification) and it is the perfect vehicle to throw around the winding path of Deep Forest Raceway. Of course, it needed a fair bit of tuning, but after that...; I was having the most phenomenal drive and walked away from my wheel in pure ecstasy (and shaking to boot).
Afterward, I went online and used a McLaren MP4-12C, from the hosts garage, around Tokyo R246, but couldn't drive it to save my life. I was too spoiled by the handling of my RM'd Elise, that I was literally smashing into walls all along the circuit; it is really a shame that you cannot tune the online cars from the hosts garage.