I've had a Lexus IS300 for four and half years now, and while it isn't a Dodge Viper, it is a decent car. Of course I bought it mostly for myself but of course there is always a bit of the flash factor.
Now I've never used in a "trolling for chics" fashion, but overall I'd say it makes little difference. I actually never mention my job or car or other bragging materialistic things like that, and in fact women are usually pleasantly surprised when they see my car. But I don't think anyone really makes a big deal out of it.
As any fairly advanced DJ knows, in the big scheme looks, clothes, cars and other flashy sh*t make little difference if you don't have the right attitude (aka game.) Of course you shouldn't be a bum either.