What FM transmitters are good??? (Docks w/ VW's)

Question

Hey, I'm looking for an FM transmitter.
I was using a headphone to headphone type jack cable and of course that worked great but not every head unit has a audio input jack on the front.
So I wanted to get an FM transmitter b/c I jump cars a lot and would like it to work regardless of the car. I need ones that broadcast good.
I bought this belkin one:
http://catalog.belkin.com/IWCatProductPage.process?Product_Id=257339
I like that one because it's "wires free" and doesn't need to be connected to anything but still has optional charging. Obviously a docking station doesn't have that ability - has to be plugged in.
and it just seems like it can't broadcast all the way to my antenna (both feet).
My roommate's letting me borrow this one:
http://images.skymall.com/images/products/1d/16/06/102112516x.jpg
He says it's real good, g2 go out today and am going to try it. Does anybody know what's good and what's not. At first I liked the belkin one which is why I bought it - it's good because it's small and compact - but it seems like it doesn't broadcast too well which is why I wanna check out what the griffin one can do.
Anybody have any suggestions? At first I wanted one that was very ergonomic but now I don't care if it has a dock or not or is required to have a cig lighter to use - at this point I Just want one that works :-\
PS:
Anybody have a docking station with an MKIV (MKIV is '99.5 - present) VW.
The cig lighter is in a weird place, it seems like a docking station transmitter won't like, fit into that due to where it's placed.
Anybody have any tips let me know. I thought this belkin one was good but I really don't like it. Very good in the way it's comapact and uses iPod's power - but it just doesn't emit strongly.

Answer 1

No, I have mine currently wired to an aftermarket jack. The reason I ask is because I switch cars A LOT due to what I do, this and that and want something that's not permanent. Something I can listen to in my car, and then take in that flatbed for long car hauls.
In my civic (my daily driver) it's hardwired into a Sony CDXGT400 head unit with an audio in jack on the front.
Most cars have cig lighters, so I'm just saying an FM transmitter's more versatile than a hardwire. I have the Belkin one, it ***. Every time I moved it I got **** reception, this was on PURE static channels too, and the antenna there is right next to the driver's side window (in the A-pillar). I haven't been able to use the one my roommate let me borrow because it won't fit into the cig lighter on my car because of the way it's designed.
When I go out tomorrow I'ma stop off at radio shack and get an extension cord.
I'll post back how it works out with the FM transmitter dock. Any more info please let me know.
I like the smaller ones (oppose the whole dock) because they're easier to deal with. Though whatever works at this point :-\