Well, I like to have more power. Of my options for a sporty used car, I won't touch a Suburu or an A4/Passat with a ten foot pole (too many major problems from owners I personally know... "They must've got a lemon"....really, all six of them bought lemons?) and the older 5 series - I think - are ugly. Plus, I don't like Toyotas and I don't like Hondas...I know, picky picky!Don't buy a rusty Mazda 6, you'll spend thousands fixing it properly.
Speed6 prices are falling, they are getting old and you can buy faster cars for the same money. Unless you really gotta have one, there are better options out there. If you are spending $7K US for on then it better be mint, no rust at all.
That being said, I'd love to have one. I love my V6 and I can only imagine how much fun a Speed is to drive.
My thinking is, I already know I like the 6, I'd just like to have some more power. Mine has been incredibly reliable, and it's still a very nice looking car. I don't mind driving an older model, if the only bad thing about it is "it's old". I could spend $20k on a newer 6 (or a Kia Stinger) but I don't really like having that kind of payment all over again...