whish

Time And Pitch Machine Question

Ok, so I've searched many many places for a detailed description or tutorial on how to ACCURATELY use this little feature, but can't find one.
It's probably something incredibly obvious, but how do I go about ACCURATELY (example: the sample is 1.5 bars long or whatever, and I want it to be 2)lengthening or shortening samples with the time and pitch machine?
Please forgive my lack of proper jargon;)
Thank you very much for your help.

Regards,
Corey

Reason Vs Logic 6 Pro Synths/plugins?

Ok- I understand that the main uses of each program is different, and that there are some (if not many) things that each can and cannot do that the other can, but I was wondering about the "sound creating abilities" of both as a whole.
I don't yet own either program, but was wondering if the synths and plugins in the upcoming Logic 6 PRO version are of any comparison or competition to that which Reason offers. Basically- could I simply buy Logic PRO and accomplish the same things on it's collection of synths, etc. without ever making anything in Reason.
I know it's commonplace to make sounds in Reason and import them to other "more professional" sequencers- but in terms of quality and so as to not waste money on redundant "equipment" purchases- is Reason still the way to go when creating sounds- or is Logic PRO's collection enough of an "arsenal"?

By the way- in case it matter at all- I'm definitely ordering Logic, but don't know if I need Reason for anything- and also what music I'm inspired by most, and might be most similar to in "feel" is music in the same vein as Nine Inch Nails, Prick, VAST, Tricky, Bjork, A Perfect Circle, Radiohead, etc.
Also- I'm more interested in guitars than "blips and bleeps" and making odd, previously unheard or unfamiliar sounds, and throwing them all together to get your head nodding.
Thanks for your help.

Regards,
Corey