I'm looking at a few different cars to start test driving within the next month or so. I'm looking new, or CPO for the most part, unless I find a 1 owner jewel. Pretty much focused on the Hot Hatch segment...

Reqs:

My List as of now:

Most GM products at this price point don't really inspire me much, the new 08 Malibu might, but it'd have to be a big improvement in driving dynamics.

Anyone have any experience on these, or own one?

Honestly, from your small list, I would have to say the GTI all the way. The 6 speed is a little slower than the DSG Auto, but if you prefer the 6 speed, go with it. The aftermarket for them is growing quickly, and they are pretty quick. My dad'* friend has a MkV GTI with a chip, intake, and some other goodies, and it kicks ***.

altima + 3.5 =

I'd go with the Speed 3 on that list.
Why not a Mitsubishi Evolution?

Hold out for the g8 with the stick

Firehawk or WS6!

If the S40 is on the list, why not look at the new C30 that Volvo has out. Seems to meet all the specs you're asking for:

http://www.volvocars.us/models/c30/default.htm

ill give you my list, based on my "read" on the type of qualities you'd want in a car:

used altima vq35 (good choice btw)
cobalt ss/sc ('nicer' gm interior; good performer)
srt4 (sportier than cobalt; slightly better performing)
wrx (awd; fast and easy to make faster; good balance of go and turn)
evo (basically same as wrx)
lexus IS (dont know too much about them; the one i rode in had a great feel to it)
the 350ztt thats listed on here
f-body if straight line is #1 in your mind

I'm trying to get into this market (purely for interest only) because there is so much variety.

I'm confused about your requirements, when you say "hot hatch" I assume 2 door hatchback a la GTI kinda thing, but I read Altima and Fusion? The Altima does come in a 2 dr coupe, but for the money, I'd rather get a used G35 coupe or Nissan Z.

I can't deal with a Ford product, so IMO, I'm rulin out the Focus and Mazdaspeed3 (but I've heard it really motors).

If it was my 25K

Infinti G35
Lexus IS250 (cant do a 350 in that price range)
VW Golf GTI

Zias, have you looked at a 2000ish BMW 3 series coupe? Hot car man...hot car.

have you thought at all about a TDI VW at all? diesel is cheap and i hear that they can push some pretty big numbers with minimal mods, just something to consider